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Finding the Fourth Proportional to 125,499.78, 173,189.34 and 75,198.78

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Solution

The fourth proportional to 125,499.78, 173,189.34 and 75,198.78 is: 103,774.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,499.78 : 173,189.34 = 75,198.78 : x
  2. Step 2: Convert to fraction form
    125,499.78/173,189.34 = 75,198.78/x
  3. Step 3: Cross multiply
    125,499.78x = 173,189.34 × 75,198.78
  4. Step 4: Simplify right side
    125,499.78x = 13,023,627,077.01
  5. Step 5: Solve for x
    x = 13,023,627,077.01/125,499.78
  6. Step 6: Final answer
    x = 103,774.10

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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.