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Finding the Fourth Proportional to 72,388.40, 108,503.40 and 25,617.20

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Solution

The fourth proportional to 72,388.40, 108,503.40 and 25,617.20 is: 38,397.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,388.40 : 108,503.40 = 25,617.20 : x
  2. Step 2: Convert to fraction form
    72,388.40/108,503.40 = 25,617.20/x
  3. Step 3: Cross multiply
    72,388.40x = 108,503.40 × 25,617.20
  4. Step 4: Simplify right side
    72,388.40x = 2,779,553,298.48
  5. Step 5: Solve for x
    x = 2,779,553,298.48/72,388.40
  6. Step 6: Final answer
    x = 38,397.77

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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.