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Finding the Fourth Proportional to 129,772.80, 194,620.80 and 50,841.60

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Solution

The fourth proportional to 129,772.80, 194,620.80 and 50,841.60 is: 76,247.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,772.80 : 194,620.80 = 50,841.60 : x
  2. Step 2: Convert to fraction form
    129,772.80/194,620.80 = 50,841.60/x
  3. Step 3: Cross multiply
    129,772.80x = 194,620.80 × 50,841.60
  4. Step 4: Simplify right side
    129,772.80x = 9,894,832,865.28
  5. Step 5: Solve for x
    x = 9,894,832,865.28/129,772.80
  6. Step 6: Final answer
    x = 76,247.36

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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.