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Finding the Fourth Proportional to 318,227.60, 477,330.60 and 81,572.60

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Solution

The fourth proportional to 318,227.60, 477,330.60 and 81,572.60 is: 122,356.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,227.60 : 477,330.60 = 81,572.60 : x
  2. Step 2: Convert to fraction form
    318,227.60/477,330.60 = 81,572.60/x
  3. Step 3: Cross multiply
    318,227.60x = 477,330.60 × 81,572.60
  4. Step 4: Simplify right side
    318,227.60x = 38,937,098,101.56
  5. Step 5: Solve for x
    x = 38,937,098,101.56/318,227.60
  6. Step 6: Final answer
    x = 122,356.13

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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.