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Finding the Fourth Proportional to 99,432.38, 137,216.70 and 54,720.38

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Solution

The fourth proportional to 99,432.38, 137,216.70 and 54,720.38 is: 75,514.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,432.38 : 137,216.70 = 54,720.38 : x
  2. Step 2: Convert to fraction form
    99,432.38/137,216.70 = 54,720.38/x
  3. Step 3: Cross multiply
    99,432.38x = 137,216.70 × 54,720.38
  4. Step 4: Simplify right side
    99,432.38x = 7,508,549,966.35
  5. Step 5: Solve for x
    x = 7,508,549,966.35/99,432.38
  6. Step 6: Final answer
    x = 75,514.13

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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.