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Finding the Fourth Proportional to 99,400.80, 149,149.10 and 49,485.30

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Solution

The fourth proportional to 99,400.80, 149,149.10 and 49,485.30 is: 74,251.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,400.80 : 149,149.10 = 49,485.30 : x
  2. Step 2: Convert to fraction form
    99,400.80/149,149.10 = 49,485.30/x
  3. Step 3: Cross multiply
    99,400.80x = 149,149.10 × 49,485.30
  4. Step 4: Simplify right side
    99,400.80x = 7,380,687,958.23
  5. Step 5: Solve for x
    x = 7,380,687,958.23/99,400.80
  6. Step 6: Final answer
    x = 74,251.80

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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.