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Finding the Fourth Proportional to 444,663.55, 667,013.78 and 129,120.46

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Solution

The fourth proportional to 444,663.55, 667,013.78 and 129,120.46 is: 193,686.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    444,663.55 : 667,013.78 = 129,120.46 : x
  2. Step 2: Convert to fraction form
    444,663.55/667,013.78 = 129,120.46/x
  3. Step 3: Cross multiply
    444,663.55x = 667,013.78 × 129,120.46
  4. Step 4: Simplify right side
    444,663.55x = 86,125,126,005.86
  5. Step 5: Solve for x
    x = 86,125,126,005.86/444,663.55
  6. Step 6: Final answer
    x = 193,686.05

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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.