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Finding the Fourth Proportional to 99,432.53, 137,216.91 and 54,720.53

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Solution

The fourth proportional to 99,432.53, 137,216.91 and 54,720.53 is: 75,514.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,432.53 : 137,216.91 = 54,720.53 : x
  2. Step 2: Convert to fraction form
    99,432.53/137,216.91 = 54,720.53/x
  3. Step 3: Cross multiply
    99,432.53x = 137,216.91 × 54,720.53
  4. Step 4: Simplify right side
    99,432.53x = 7,508,581,217.28
  5. Step 5: Solve for x
    x = 7,508,581,217.28/99,432.53
  6. Step 6: Final answer
    x = 75,514.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.