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Finding the Fourth Proportional to 81,962.70, 122,944.05 and 40,404.30

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Solution

The fourth proportional to 81,962.70, 122,944.05 and 40,404.30 is: 60,606.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,962.70 : 122,944.05 = 40,404.30 : x
  2. Step 2: Convert to fraction form
    81,962.70/122,944.05 = 40,404.30/x
  3. Step 3: Cross multiply
    81,962.70x = 122,944.05 × 40,404.30
  4. Step 4: Simplify right side
    81,962.70x = 4,967,468,279.42
  5. Step 5: Solve for x
    x = 4,967,468,279.42/81,962.70
  6. Step 6: Final answer
    x = 60,606.45

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Similar ratio
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1.5x scale

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.