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Finding the Fourth Proportional to 71,561.44, 107,128.86 and 43,396.66

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Solution

The fourth proportional to 71,561.44, 107,128.86 and 43,396.66 is: 64,965.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,561.44 : 107,128.86 = 43,396.66 : x
  2. Step 2: Convert to fraction form
    71,561.44/107,128.86 = 43,396.66/x
  3. Step 3: Cross multiply
    71,561.44x = 107,128.86 × 43,396.66
  4. Step 4: Simplify right side
    71,561.44x = 4,649,034,713.61
  5. Step 5: Solve for x
    x = 4,649,034,713.61/71,561.44
  6. Step 6: Final answer
    x = 64,965.64

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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.