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Finding the Fourth Proportional to 215,668.46, 297,644.62 and 129,655.29

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Solution

The fourth proportional to 215,668.46, 297,644.62 and 129,655.29 is: 178,937.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,668.46 : 297,644.62 = 129,655.29 : x
  2. Step 2: Convert to fraction form
    215,668.46/297,644.62 = 129,655.29/x
  3. Step 3: Cross multiply
    215,668.46x = 297,644.62 × 129,655.29
  4. Step 4: Simplify right side
    215,668.46x = 38,591,197,710.68
  5. Step 5: Solve for x
    x = 38,591,197,710.68/215,668.46
  6. Step 6: Final answer
    x = 178,937.61

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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.