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Finding the Fourth Proportional to 86,253.96, 129,208.71 and 68,514.66

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Solution

The fourth proportional to 86,253.96, 129,208.71 and 68,514.66 is: 102,635.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,253.96 : 129,208.71 = 68,514.66 : x
  2. Step 2: Convert to fraction form
    86,253.96/129,208.71 = 68,514.66/x
  3. Step 3: Cross multiply
    86,253.96x = 129,208.71 × 68,514.66
  4. Step 4: Simplify right side
    86,253.96x = 8,852,690,834.69
  5. Step 5: Solve for x
    x = 8,852,690,834.69/86,253.96
  6. Step 6: Final answer
    x = 102,635.18

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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.