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Finding the Fourth Proportional to 71,231.97, 98,749.65 and 67,439.96

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Solution

The fourth proportional to 71,231.97, 98,749.65 and 67,439.96 is: 93,492.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,231.97 : 98,749.65 = 67,439.96 : x
  2. Step 2: Convert to fraction form
    71,231.97/98,749.65 = 67,439.96/x
  3. Step 3: Cross multiply
    71,231.97x = 98,749.65 × 67,439.96
  4. Step 4: Simplify right side
    71,231.97x = 6,659,672,196.13
  5. Step 5: Solve for x
    x = 6,659,672,196.13/71,231.97
  6. Step 6: Final answer
    x = 93,492.74

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.