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Finding the Fourth Proportional to 129,373.59, 194,049.27 and 78,759.48

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Solution

The fourth proportional to 129,373.59, 194,049.27 and 78,759.48 is: 118,132.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,373.59 : 194,049.27 = 78,759.48 : x
  2. Step 2: Convert to fraction form
    129,373.59/194,049.27 = 78,759.48/x
  3. Step 3: Cross multiply
    129,373.59x = 194,049.27 × 78,759.48
  4. Step 4: Simplify right side
    129,373.59x = 15,283,219,599.58
  5. Step 5: Solve for x
    x = 15,283,219,599.58/129,373.59
  6. Step 6: Final answer
    x = 118,132.45

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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.