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Finding the Fourth Proportional to 129,876.80, 194,815.20 and 70,827.80

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Solution

The fourth proportional to 129,876.80, 194,815.20 and 70,827.80 is: 106,241.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,876.80 : 194,815.20 = 70,827.80 : x
  2. Step 2: Convert to fraction form
    129,876.80/194,815.20 = 70,827.80/x
  3. Step 3: Cross multiply
    129,876.80x = 194,815.20 × 70,827.80
  4. Step 4: Simplify right side
    129,876.80x = 13,798,332,022.56
  5. Step 5: Solve for x
    x = 13,798,332,022.56/129,876.80
  6. Step 6: Final answer
    x = 106,241.70

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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.