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Finding the Fourth Proportional to 86,512.61, 129,722.65 and 44,375.47

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Solution

The fourth proportional to 86,512.61, 129,722.65 and 44,375.47 is: 66,539.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,512.61 : 129,722.65 = 44,375.47 : x
  2. Step 2: Convert to fraction form
    86,512.61/129,722.65 = 44,375.47/x
  3. Step 3: Cross multiply
    86,512.61x = 129,722.65 × 44,375.47
  4. Step 4: Simplify right side
    86,512.61x = 5,756,503,128.15
  5. Step 5: Solve for x
    x = 5,756,503,128.15/86,512.61
  6. Step 6: Final answer
    x = 66,539.47

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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.