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Finding the Fourth Proportional to 247,807.20, 371,419.20 and 129,417.60

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Solution

The fourth proportional to 247,807.20, 371,419.20 and 129,417.60 is: 193,974.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,807.20 : 371,419.20 = 129,417.60 : x
  2. Step 2: Convert to fraction form
    247,807.20/371,419.20 = 129,417.60/x
  3. Step 3: Cross multiply
    247,807.20x = 371,419.20 × 129,417.60
  4. Step 4: Simplify right side
    247,807.20x = 48,068,181,457.92
  5. Step 5: Solve for x
    x = 48,068,181,457.92/247,807.20
  6. Step 6: Final answer
    x = 193,974.11

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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.