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Finding the Fourth Proportional to 487,115.96, 730,674.58 and 132,129.72

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Solution

The fourth proportional to 487,115.96, 730,674.58 and 132,129.72 is: 198,194.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,115.96 : 730,674.58 = 132,129.72 : x
  2. Step 2: Convert to fraction form
    487,115.96/730,674.58 = 132,129.72/x
  3. Step 3: Cross multiply
    487,115.96x = 730,674.58 × 132,129.72
  4. Step 4: Simplify right side
    487,115.96x = 96,543,827,666.52
  5. Step 5: Solve for x
    x = 96,543,827,666.52/487,115.96
  6. Step 6: Final answer
    x = 198,194.75

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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.