Home / 139,968,763.20-209,953,144.80-86,146,401.60

Finding the Fourth Proportional to 139,968,763.20, 209,953,144.80 and 86,146,401.60

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Solution

The fourth proportional to 139,968,763.20, 209,953,144.80 and 86,146,401.60 is: 129,219,602.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,763.20 : 209,953,144.80 = 86,146,401.60 : x
  2. Step 2: Convert to fraction form
    139,968,763.20/209,953,144.80 = 86,146,401.60/x
  3. Step 3: Cross multiply
    139,968,763.20x = 209,953,144.80 × 86,146,401.60
  4. Step 4: Simplify right side
    139,968,763.20x = 18,086,707,929,123,752
  5. Step 5: Solve for x
    x = 18,086,707,929,123,752/139,968,763.20
  6. Step 6: Final answer
    x = 129,219,602.40

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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.