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Finding the Fourth Proportional to 129,573, 193,920.60 and 79,684.74

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Solution

The fourth proportional to 129,573, 193,920.60 and 79,684.74 is: 119,257.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,573 : 193,920.60 = 79,684.74 : x
  2. Step 2: Convert to fraction form
    129,573/193,920.60 = 79,684.74/x
  3. Step 3: Cross multiply
    129,573x = 193,920.60 × 79,684.74
  4. Step 4: Simplify right side
    129,573x = 15,452,512,591.64
  5. Step 5: Solve for x
    x = 15,452,512,591.64/129,573
  6. Step 6: Final answer
    x = 119,257.20

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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.