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Finding the Fourth Proportional to 129,689.80, 194,102.70 and 94,049.80

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Solution

The fourth proportional to 129,689.80, 194,102.70 and 94,049.80 is: 140,761.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,689.80 : 194,102.70 = 94,049.80 : x
  2. Step 2: Convert to fraction form
    129,689.80/194,102.70 = 94,049.80/x
  3. Step 3: Cross multiply
    129,689.80x = 194,102.70 × 94,049.80
  4. Step 4: Simplify right side
    129,689.80x = 18,255,320,114.46
  5. Step 5: Solve for x
    x = 18,255,320,114.46/129,689.80
  6. Step 6: Final answer
    x = 140,761.42

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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.