Home / 128,012,938.78-176,658,295.20-69,275,588.38

Finding the Fourth Proportional to 128,012,938.78, 176,658,295.20 and 69,275,588.38

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Solution

The fourth proportional to 128,012,938.78, 176,658,295.20 and 69,275,588.38 is: 95,600,549.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,012,938.78 : 176,658,295.20 = 69,275,588.38 : x
  2. Step 2: Convert to fraction form
    128,012,938.78/176,658,295.20 = 69,275,588.38/x
  3. Step 3: Cross multiply
    128,012,938.78x = 176,658,295.20 × 69,275,588.38
  4. Step 4: Simplify right side
    128,012,938.78x = 12,238,107,342,187,728
  5. Step 5: Solve for x
    x = 12,238,107,342,187,728/128,012,938.78
  6. Step 6: Final answer
    x = 95,600,549.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.