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Finding the Fourth Proportional to 66,353.43, 91,565.89 and 36,138.09

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Solution

The fourth proportional to 66,353.43, 91,565.89 and 36,138.09 is: 49,869.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,353.43 : 91,565.89 = 36,138.09 : x
  2. Step 2: Convert to fraction form
    66,353.43/91,565.89 = 36,138.09/x
  3. Step 3: Cross multiply
    66,353.43x = 91,565.89 × 36,138.09
  4. Step 4: Simplify right side
    66,353.43x = 3,309,016,373.75
  5. Step 5: Solve for x
    x = 3,309,016,373.75/66,353.43
  6. Step 6: Final answer
    x = 49,869.56

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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.