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Finding the Fourth Proportional to 121,816.20, 182,724.30 and 88,379.40

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Solution

The fourth proportional to 121,816.20, 182,724.30 and 88,379.40 is: 132,569.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,816.20 : 182,724.30 = 88,379.40 : x
  2. Step 2: Convert to fraction form
    121,816.20/182,724.30 = 88,379.40/x
  3. Step 3: Cross multiply
    121,816.20x = 182,724.30 × 88,379.40
  4. Step 4: Simplify right side
    121,816.20x = 16,149,063,999.42
  5. Step 5: Solve for x
    x = 16,149,063,999.42/121,816.20
  6. Step 6: Final answer
    x = 132,569.10

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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.