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Finding the Fourth Proportional to 86,170.86, 118,921.26 and 48,447.54

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Solution

The fourth proportional to 86,170.86, 118,921.26 and 48,447.54 is: 66,860.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,170.86 : 118,921.26 = 48,447.54 : x
  2. Step 2: Convert to fraction form
    86,170.86/118,921.26 = 48,447.54/x
  3. Step 3: Cross multiply
    86,170.86x = 118,921.26 × 48,447.54
  4. Step 4: Simplify right side
    86,170.86x = 5,761,442,500.70
  5. Step 5: Solve for x
    x = 5,761,442,500.70/86,170.86
  6. Step 6: Final answer
    x = 66,860.68

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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.