Home / 80,861,407.20-121,209,442.20-39,857,781.60

Finding the Fourth Proportional to 80,861,407.20, 121,209,442.20 and 39,857,781.60

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Solution

The fourth proportional to 80,861,407.20, 121,209,442.20 and 39,857,781.60 is: 59,745,923.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,861,407.20 : 121,209,442.20 = 39,857,781.60 : x
  2. Step 2: Convert to fraction form
    80,861,407.20/121,209,442.20 = 39,857,781.60/x
  3. Step 3: Cross multiply
    80,861,407.20x = 121,209,442.20 × 39,857,781.60
  4. Step 4: Simplify right side
    80,861,407.20x = 4,831,139,475,065,424
  5. Step 5: Solve for x
    x = 4,831,139,475,065,424/80,861,407.20
  6. Step 6: Final answer
    x = 59,745,923.83

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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.