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Finding the Fourth Proportional to 99,229.92, 136,939.44 and 54,520.80

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Solution

The fourth proportional to 99,229.92, 136,939.44 and 54,520.80 is: 75,239.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,229.92 : 136,939.44 = 54,520.80 : x
  2. Step 2: Convert to fraction form
    99,229.92/136,939.44 = 54,520.80/x
  3. Step 3: Cross multiply
    99,229.92x = 136,939.44 × 54,520.80
  4. Step 4: Simplify right side
    99,229.92x = 7,466,047,820.35
  5. Step 5: Solve for x
    x = 7,466,047,820.35/99,229.92
  6. Step 6: Final answer
    x = 75,239.89

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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.