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Finding the Fourth Proportional to 132,005.80, 198,008.70 and 79,474.60

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Solution

The fourth proportional to 132,005.80, 198,008.70 and 79,474.60 is: 119,211.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,005.80 : 198,008.70 = 79,474.60 : x
  2. Step 2: Convert to fraction form
    132,005.80/198,008.70 = 79,474.60/x
  3. Step 3: Cross multiply
    132,005.80x = 198,008.70 × 79,474.60
  4. Step 4: Simplify right side
    132,005.80x = 15,736,662,229.02
  5. Step 5: Solve for x
    x = 15,736,662,229.02/132,005.80
  6. Step 6: Final answer
    x = 119,211.90

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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.