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Finding the Fourth Proportional to 81,073.62, 111,912.24 and 63,801.18

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Solution

The fourth proportional to 81,073.62, 111,912.24 and 63,801.18 is: 88,069.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,073.62 : 111,912.24 = 63,801.18 : x
  2. Step 2: Convert to fraction form
    81,073.62/111,912.24 = 63,801.18/x
  3. Step 3: Cross multiply
    81,073.62x = 111,912.24 × 63,801.18
  4. Step 4: Simplify right side
    81,073.62x = 7,140,132,968.44
  5. Step 5: Solve for x
    x = 7,140,132,968.44/81,073.62
  6. Step 6: Final answer
    x = 88,069.74

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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.