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Finding the Fourth Proportional to 99,441.80, 148,932.30 and 68,107.40

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Solution

The fourth proportional to 99,441.80, 148,932.30 and 68,107.40 is: 102,003.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,441.80 : 148,932.30 = 68,107.40 : x
  2. Step 2: Convert to fraction form
    99,441.80/148,932.30 = 68,107.40/x
  3. Step 3: Cross multiply
    99,441.80x = 148,932.30 × 68,107.40
  4. Step 4: Simplify right side
    99,441.80x = 10,143,391,729.02
  5. Step 5: Solve for x
    x = 10,143,391,729.02/99,441.80
  6. Step 6: Final answer
    x = 102,003.30

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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.