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Finding the Fourth Proportional to 99,530.20, 148,930.80 and 73,286.20

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Solution

The fourth proportional to 99,530.20, 148,930.80 and 73,286.20 is: 109,660.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,530.20 : 148,930.80 = 73,286.20 : x
  2. Step 2: Convert to fraction form
    99,530.20/148,930.80 = 73,286.20/x
  3. Step 3: Cross multiply
    99,530.20x = 148,930.80 × 73,286.20
  4. Step 4: Simplify right side
    99,530.20x = 10,914,572,394.96
  5. Step 5: Solve for x
    x = 10,914,572,394.96/99,530.20
  6. Step 6: Final answer
    x = 109,660.91

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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.