Home / 80,861,755.20-121,209,964.20-39,858,129.60

Finding the Fourth Proportional to 80,861,755.20, 121,209,964.20 and 39,858,129.60

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Solution

The fourth proportional to 80,861,755.20, 121,209,964.20 and 39,858,129.60 is: 59,746,445.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,861,755.20 : 121,209,964.20 = 39,858,129.60 : x
  2. Step 2: Convert to fraction form
    80,861,755.20/121,209,964.20 = 39,858,129.60/x
  3. Step 3: Cross multiply
    80,861,755.20x = 121,209,964.20 × 39,858,129.60
  4. Step 4: Simplify right side
    80,861,755.20x = 4,831,202,461,894,961
  5. Step 5: Solve for x
    x = 4,831,202,461,894,961/80,861,755.20
  6. Step 6: Final answer
    x = 59,746,445.65

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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.