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Finding the Fourth Proportional to 115,447.28, 159,353.53 and 67,719.92

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Solution

The fourth proportional to 115,447.28, 159,353.53 and 67,719.92 is: 93,474.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,447.28 : 159,353.53 = 67,719.92 : x
  2. Step 2: Convert to fraction form
    115,447.28/159,353.53 = 67,719.92/x
  3. Step 3: Cross multiply
    115,447.28x = 159,353.53 × 67,719.92
  4. Step 4: Simplify right side
    115,447.28x = 10,791,407,337.25
  5. Step 5: Solve for x
    x = 10,791,407,337.25/115,447.28
  6. Step 6: Final answer
    x = 93,474.77

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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.