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Finding the Fourth Proportional to 129,868.29, 194,450.54 and 67,407.57

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Solution

The fourth proportional to 129,868.29, 194,450.54 and 67,407.57 is: 100,928.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,868.29 : 194,450.54 = 67,407.57 : x
  2. Step 2: Convert to fraction form
    129,868.29/194,450.54 = 67,407.57/x
  3. Step 3: Cross multiply
    129,868.29x = 194,450.54 × 67,407.57
  4. Step 4: Simplify right side
    129,868.29x = 13,107,438,049.55
  5. Step 5: Solve for x
    x = 13,107,438,049.55/129,868.29
  6. Step 6: Final answer
    x = 100,928.70

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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.