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Finding the Fourth Proportional to 99,141.80, 148,280.70 and 88,687.40

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Solution

The fourth proportional to 99,141.80, 148,280.70 and 88,687.40 is: 132,644.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,141.80 : 148,280.70 = 88,687.40 : x
  2. Step 2: Convert to fraction form
    99,141.80/148,280.70 = 88,687.40/x
  3. Step 3: Cross multiply
    99,141.80x = 148,280.70 × 88,687.40
  4. Step 4: Simplify right side
    99,141.80x = 13,150,629,753.18
  5. Step 5: Solve for x
    x = 13,150,629,753.18/99,141.80
  6. Step 6: Final answer
    x = 132,644.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.