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Finding the Fourth Proportional to 138,874.86, 191,647.25 and 75,212.66

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Solution

The fourth proportional to 138,874.86, 191,647.25 and 75,212.66 is: 103,793.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,874.86 : 191,647.25 = 75,212.66 : x
  2. Step 2: Convert to fraction form
    138,874.86/191,647.25 = 75,212.66/x
  3. Step 3: Cross multiply
    138,874.86x = 191,647.25 × 75,212.66
  4. Step 4: Simplify right side
    138,874.86x = 14,414,299,454.19
  5. Step 5: Solve for x
    x = 14,414,299,454.19/138,874.86
  6. Step 6: Final answer
    x = 103,793.44

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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.