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Finding the Fourth Proportional to 129,265.20, 193,897.80 and 87,274.80

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Solution

The fourth proportional to 129,265.20, 193,897.80 and 87,274.80 is: 130,912.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,265.20 : 193,897.80 = 87,274.80 : x
  2. Step 2: Convert to fraction form
    129,265.20/193,897.80 = 87,274.80/x
  3. Step 3: Cross multiply
    129,265.20x = 193,897.80 × 87,274.80
  4. Step 4: Simplify right side
    129,265.20x = 16,922,391,715.44
  5. Step 5: Solve for x
    x = 16,922,391,715.44/129,265.20
  6. Step 6: Final answer
    x = 130,912.20

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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.