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Finding the Fourth Proportional to 86,339.86, 119,101.22 and 71,876.90

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Solution

The fourth proportional to 86,339.86, 119,101.22 and 71,876.90 is: 99,150.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,339.86 : 119,101.22 = 71,876.90 : x
  2. Step 2: Convert to fraction form
    86,339.86/119,101.22 = 71,876.90/x
  3. Step 3: Cross multiply
    86,339.86x = 119,101.22 × 71,876.90
  4. Step 4: Simplify right side
    86,339.86x = 8,560,626,687.72
  5. Step 5: Solve for x
    x = 8,560,626,687.72/86,339.86
  6. Step 6: Final answer
    x = 99,150.35

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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.