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Finding the Fourth Proportional to 99,489.60, 149,061.60 and 83,937.60

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Solution

The fourth proportional to 99,489.60, 149,061.60 and 83,937.60 is: 125,760.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,489.60 : 149,061.60 = 83,937.60 : x
  2. Step 2: Convert to fraction form
    99,489.60/149,061.60 = 83,937.60/x
  3. Step 3: Cross multiply
    99,489.60x = 149,061.60 × 83,937.60
  4. Step 4: Simplify right side
    99,489.60x = 12,511,872,956.16
  5. Step 5: Solve for x
    x = 12,511,872,956.16/99,489.60
  6. Step 6: Final answer
    x = 125,760.61

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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.