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Finding the Fourth Proportional to 129,941.70, 194,912.55 and 87,951.30

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Solution

The fourth proportional to 129,941.70, 194,912.55 and 87,951.30 is: 131,926.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,941.70 : 194,912.55 = 87,951.30 : x
  2. Step 2: Convert to fraction form
    129,941.70/194,912.55 = 87,951.30/x
  3. Step 3: Cross multiply
    129,941.70x = 194,912.55 × 87,951.30
  4. Step 4: Simplify right side
    129,941.70x = 17,142,812,158.82
  5. Step 5: Solve for x
    x = 17,142,812,158.82/129,941.70
  6. Step 6: Final answer
    x = 131,926.95

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1.5x scale

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.