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Finding the Fourth Proportional to 99,605.80, 148,976.70 and 89,151.40

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Solution

The fourth proportional to 99,605.80, 148,976.70 and 89,151.40 is: 133,340.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,605.80 : 148,976.70 = 89,151.40 : x
  2. Step 2: Convert to fraction form
    99,605.80/148,976.70 = 89,151.40/x
  3. Step 3: Cross multiply
    99,605.80x = 148,976.70 × 89,151.40
  4. Step 4: Simplify right side
    99,605.80x = 13,281,481,372.38
  5. Step 5: Solve for x
    x = 13,281,481,372.38/99,605.80
  6. Step 6: Final answer
    x = 133,340.44

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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.