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Finding the Fourth Proportional to 81,372.32, 112,287.36 and 45,554

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Solution

The fourth proportional to 81,372.32, 112,287.36 and 45,554 is: 62,860.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,372.32 : 112,287.36 = 45,554 : x
  2. Step 2: Convert to fraction form
    81,372.32/112,287.36 = 45,554/x
  3. Step 3: Cross multiply
    81,372.32x = 112,287.36 × 45,554
  4. Step 4: Simplify right side
    81,372.32x = 5,115,138,397.44
  5. Step 5: Solve for x
    x = 5,115,138,397.44/81,372.32
  6. Step 6: Final answer
    x = 62,860.91

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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.