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Finding the Fourth Proportional to 81,787.44, 112,866.03 and 45,489.22

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Solution

The fourth proportional to 81,787.44, 112,866.03 and 45,489.22 is: 62,774.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,787.44 : 112,866.03 = 45,489.22 : x
  2. Step 2: Convert to fraction form
    81,787.44/112,866.03 = 45,489.22/x
  3. Step 3: Cross multiply
    81,787.44x = 112,866.03 × 45,489.22
  4. Step 4: Simplify right side
    81,787.44x = 5,134,187,387.03
  5. Step 5: Solve for x
    x = 5,134,187,387.03/81,787.44
  6. Step 6: Final answer
    x = 62,774.77

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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.