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Finding the Fourth Proportional to 125,616.30, 188,132.85 and 85,958.70

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Solution

The fourth proportional to 125,616.30, 188,132.85 and 85,958.70 is: 128,738.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,616.30 : 188,132.85 = 85,958.70 : x
  2. Step 2: Convert to fraction form
    125,616.30/188,132.85 = 85,958.70/x
  3. Step 3: Cross multiply
    125,616.30x = 188,132.85 × 85,958.70
  4. Step 4: Simplify right side
    125,616.30x = 16,171,655,213.30
  5. Step 5: Solve for x
    x = 16,171,655,213.30/125,616.30
  6. Step 6: Final answer
    x = 128,738.51

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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.