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Finding the Fourth Proportional to 318,217.60, 477,315.60 and 81,562.60

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Solution

The fourth proportional to 318,217.60, 477,315.60 and 81,562.60 is: 122,341.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,217.60 : 477,315.60 = 81,562.60 : x
  2. Step 2: Convert to fraction form
    318,217.60/477,315.60 = 81,562.60/x
  3. Step 3: Cross multiply
    318,217.60x = 477,315.60 × 81,562.60
  4. Step 4: Simplify right side
    318,217.60x = 38,931,101,356.56
  5. Step 5: Solve for x
    x = 38,931,101,356.56/318,217.60
  6. Step 6: Final answer
    x = 122,341.13

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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.