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Finding the Fourth Proportional to 124,399.56, 171,740.13 and 87,663.42

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Solution

The fourth proportional to 124,399.56, 171,740.13 and 87,663.42 is: 121,023.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,399.56 : 171,740.13 = 87,663.42 : x
  2. Step 2: Convert to fraction form
    124,399.56/171,740.13 = 87,663.42/x
  3. Step 3: Cross multiply
    124,399.56x = 171,740.13 × 87,663.42
  4. Step 4: Simplify right side
    124,399.56x = 15,055,327,147.04
  5. Step 5: Solve for x
    x = 15,055,327,147.04/124,399.56
  6. Step 6: Final answer
    x = 121,023.96

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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.