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Finding the Fourth Proportional to 445,113.32, 667,779.42 and 129,572.96

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Solution

The fourth proportional to 445,113.32, 667,779.42 and 129,572.96 is: 194,391.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,113.32 : 667,779.42 = 129,572.96 : x
  2. Step 2: Convert to fraction form
    445,113.32/667,779.42 = 129,572.96/x
  3. Step 3: Cross multiply
    445,113.32x = 667,779.42 × 129,572.96
  4. Step 4: Simplify right side
    445,113.32x = 86,526,156,076.48
  5. Step 5: Solve for x
    x = 86,526,156,076.48/445,113.32
  6. Step 6: Final answer
    x = 194,391.30

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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.