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Finding the Fourth Proportional to 87,561, 120,853.08 and 55,723.14

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Solution

The fourth proportional to 87,561, 120,853.08 and 55,723.14 is: 76,909.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,561 : 120,853.08 = 55,723.14 : x
  2. Step 2: Convert to fraction form
    87,561/120,853.08 = 55,723.14/x
  3. Step 3: Cross multiply
    87,561x = 120,853.08 × 55,723.14
  4. Step 4: Simplify right side
    87,561x = 6,734,313,096.27
  5. Step 5: Solve for x
    x = 6,734,313,096.27/87,561
  6. Step 6: Final answer
    x = 76,909.96

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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.