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Finding the Fourth Proportional to 121,497.32, 167,662.50 and 71,229.80

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Solution

The fourth proportional to 121,497.32, 167,662.50 and 71,229.80 is: 98,294.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,497.32 : 167,662.50 = 71,229.80 : x
  2. Step 2: Convert to fraction form
    121,497.32/167,662.50 = 71,229.80/x
  3. Step 3: Cross multiply
    121,497.32x = 167,662.50 × 71,229.80
  4. Step 4: Simplify right side
    121,497.32x = 11,942,566,342.50
  5. Step 5: Solve for x
    x = 11,942,566,342.50/121,497.32
  6. Step 6: Final answer
    x = 98,294.90

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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.