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Finding the Fourth Proportional to 85,593.60, 128,332.80 and 38,822.40

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Solution

The fourth proportional to 85,593.60, 128,332.80 and 38,822.40 is: 58,207.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,593.60 : 128,332.80 = 38,822.40 : x
  2. Step 2: Convert to fraction form
    85,593.60/128,332.80 = 38,822.40/x
  3. Step 3: Cross multiply
    85,593.60x = 128,332.80 × 38,822.40
  4. Step 4: Simplify right side
    85,593.60x = 4,982,187,294.72
  5. Step 5: Solve for x
    x = 4,982,187,294.72/85,593.60
  6. Step 6: Final answer
    x = 58,207.47

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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.