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Finding the Fourth Proportional to 71,379.86, 98,499.92 and 39,546.45

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Solution

The fourth proportional to 71,379.86, 98,499.92 and 39,546.45 is: 54,571.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,379.86 : 98,499.92 = 39,546.45 : x
  2. Step 2: Convert to fraction form
    71,379.86/98,499.92 = 39,546.45/x
  3. Step 3: Cross multiply
    71,379.86x = 98,499.92 × 39,546.45
  4. Step 4: Simplify right side
    71,379.86x = 3,895,321,963.55
  5. Step 5: Solve for x
    x = 3,895,321,963.55/71,379.86
  6. Step 6: Final answer
    x = 54,571.73

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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.