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Finding the Fourth Proportional to 71,919.78, 107,879.67 and 45,569.07

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Solution

The fourth proportional to 71,919.78, 107,879.67 and 45,569.07 is: 68,353.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,919.78 : 107,879.67 = 45,569.07 : x
  2. Step 2: Convert to fraction form
    71,919.78/107,879.67 = 45,569.07/x
  3. Step 3: Cross multiply
    71,919.78x = 107,879.67 × 45,569.07
  4. Step 4: Simplify right side
    71,919.78x = 4,915,976,233.81
  5. Step 5: Solve for x
    x = 4,915,976,233.81/71,919.78
  6. Step 6: Final answer
    x = 68,353.61

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Similar ratio
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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.