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Finding the Fourth Proportional to 121,316.52, 181,753.11 and 87,953.88

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Solution

The fourth proportional to 121,316.52, 181,753.11 and 87,953.88 is: 131,770.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,316.52 : 181,753.11 = 87,953.88 : x
  2. Step 2: Convert to fraction form
    121,316.52/181,753.11 = 87,953.88/x
  3. Step 3: Cross multiply
    121,316.52x = 181,753.11 × 87,953.88
  4. Step 4: Simplify right side
    121,316.52x = 15,985,891,226.57
  5. Step 5: Solve for x
    x = 15,985,891,226.57/121,316.52
  6. Step 6: Final answer
    x = 131,770.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.