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Finding the Fourth Proportional to 447,765.77, 671,737.28 and 127,920.39

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Solution

The fourth proportional to 447,765.77, 671,737.28 and 127,920.39 is: 191,905.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,765.77 : 671,737.28 = 127,920.39 : x
  2. Step 2: Convert to fraction form
    447,765.77/671,737.28 = 127,920.39/x
  3. Step 3: Cross multiply
    447,765.77x = 671,737.28 × 127,920.39
  4. Step 4: Simplify right side
    447,765.77x = 85,928,894,195.54
  5. Step 5: Solve for x
    x = 85,928,894,195.54/447,765.77
  6. Step 6: Final answer
    x = 191,905.90

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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.