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Finding the Fourth Proportional to 91,585.92, 126,399.78 and 55,781.13

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Solution

The fourth proportional to 91,585.92, 126,399.78 and 55,781.13 is: 76,984.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,585.92 : 126,399.78 = 55,781.13 : x
  2. Step 2: Convert to fraction form
    91,585.92/126,399.78 = 55,781.13/x
  3. Step 3: Cross multiply
    91,585.92x = 126,399.78 × 55,781.13
  4. Step 4: Simplify right side
    91,585.92x = 7,050,722,560.15
  5. Step 5: Solve for x
    x = 7,050,722,560.15/91,585.92
  6. Step 6: Final answer
    x = 76,984.79

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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.