Home / 138,521,663,999.78-207,782,495,999.67-138,521,663,999.78

Finding the Fourth Proportional to 138,521,663,999.78, 207,782,495,999.67 and 138,521,663,999.78

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Solution

The fourth proportional to 138,521,663,999.78, 207,782,495,999.67 and 138,521,663,999.78 is: 207,782,495,999.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,521,663,999.78 : 207,782,495,999.67 = 138,521,663,999.78 : x
  2. Step 2: Convert to fraction form
    138,521,663,999.78/207,782,495,999.67 = 138,521,663,999.78/x
  3. Step 3: Cross multiply
    138,521,663,999.78x = 207,782,495,999.67 × 138,521,663,999.78
  4. Step 4: Simplify right side
    138,521,663,999.78x = 28,782,377,095,901,921,411,072
  5. Step 5: Solve for x
    x = 28,782,377,095,901,921,411,072/138,521,663,999.78
  6. Step 6: Final answer
    x = 207,782,495,999.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.