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Finding the Fourth Proportional to 132,685.60, 198,769.20 and 79,938.40

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Solution

The fourth proportional to 132,685.60, 198,769.20 and 79,938.40 is: 119,751.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,685.60 : 198,769.20 = 79,938.40 : x
  2. Step 2: Convert to fraction form
    132,685.60/198,769.20 = 79,938.40/x
  3. Step 3: Cross multiply
    132,685.60x = 198,769.20 × 79,938.40
  4. Step 4: Simplify right side
    132,685.60x = 15,889,291,817.28
  5. Step 5: Solve for x
    x = 15,889,291,817.28/132,685.60
  6. Step 6: Final answer
    x = 119,751.44

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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.