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Finding the Fourth Proportional to 71,872.97, 99,182.41 and 45,029.97

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Solution

The fourth proportional to 71,872.97, 99,182.41 and 45,029.97 is: 62,139.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,872.97 : 99,182.41 = 45,029.97 : x
  2. Step 2: Convert to fraction form
    71,872.97/99,182.41 = 45,029.97/x
  3. Step 3: Cross multiply
    71,872.97x = 99,182.41 × 45,029.97
  4. Step 4: Simplify right side
    71,872.97x = 4,466,180,834.25
  5. Step 5: Solve for x
    x = 4,466,180,834.25/71,872.97
  6. Step 6: Final answer
    x = 62,139.93

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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.