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Finding the Fourth Proportional to 125,500.78, 173,190.72 and 75,199.78

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Solution

The fourth proportional to 125,500.78, 173,190.72 and 75,199.78 is: 103,775.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,500.78 : 173,190.72 = 75,199.78 : x
  2. Step 2: Convert to fraction form
    125,500.78/173,190.72 = 75,199.78/x
  3. Step 3: Cross multiply
    125,500.78x = 173,190.72 × 75,199.78
  4. Step 4: Simplify right side
    125,500.78x = 13,023,904,042.04
  5. Step 5: Solve for x
    x = 13,023,904,042.04/125,500.78
  6. Step 6: Final answer
    x = 103,775.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.