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Finding the Fourth Proportional to 99,230.67, 136,862.88 and 68,654.64

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Solution

The fourth proportional to 99,230.67, 136,862.88 and 68,654.64 is: 94,691.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,230.67 : 136,862.88 = 68,654.64 : x
  2. Step 2: Convert to fraction form
    99,230.67/136,862.88 = 68,654.64/x
  3. Step 3: Cross multiply
    99,230.67x = 136,862.88 × 68,654.64
  4. Step 4: Simplify right side
    99,230.67x = 9,396,271,755.76
  5. Step 5: Solve for x
    x = 9,396,271,755.76/99,230.67
  6. Step 6: Final answer
    x = 94,691.21

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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.