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Finding the Fourth Proportional to 318,151.20, 477,215.84 and 81,495.92

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Solution

The fourth proportional to 318,151.20, 477,215.84 and 81,495.92 is: 122,241.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,151.20 : 477,215.84 = 81,495.92 : x
  2. Step 2: Convert to fraction form
    318,151.20/477,215.84 = 81,495.92/x
  3. Step 3: Cross multiply
    318,151.20x = 477,215.84 × 81,495.92
  4. Step 4: Simplify right side
    318,151.20x = 38,891,143,919.37
  5. Step 5: Solve for x
    x = 38,891,143,919.37/318,151.20
  6. Step 6: Final answer
    x = 122,241.07

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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.