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Finding the Fourth Proportional to 132,458.60, 198,234.30 and 79,905.80

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Solution

The fourth proportional to 132,458.60, 198,234.30 and 79,905.80 is: 119,585.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,458.60 : 198,234.30 = 79,905.80 : x
  2. Step 2: Convert to fraction form
    132,458.60/198,234.30 = 79,905.80/x
  3. Step 3: Cross multiply
    132,458.60x = 198,234.30 × 79,905.80
  4. Step 4: Simplify right side
    132,458.60x = 15,840,070,328.94
  5. Step 5: Solve for x
    x = 15,840,070,328.94/132,458.60
  6. Step 6: Final answer
    x = 119,585.07

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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.