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Finding the Fourth Proportional to 132,513.60, 198,316.80 and 79,960.80

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Solution

The fourth proportional to 132,513.60, 198,316.80 and 79,960.80 is: 119,667.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,513.60 : 198,316.80 = 79,960.80 : x
  2. Step 2: Convert to fraction form
    132,513.60/198,316.80 = 79,960.80/x
  3. Step 3: Cross multiply
    132,513.60x = 198,316.80 × 79,960.80
  4. Step 4: Simplify right side
    132,513.60x = 15,857,569,981.44
  5. Step 5: Solve for x
    x = 15,857,569,981.44/132,513.60
  6. Step 6: Final answer
    x = 119,667.49

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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.