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Finding the Fourth Proportional to 86,675.91, 129,834.78 and 51,027.39

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Solution

The fourth proportional to 86,675.91, 129,834.78 and 51,027.39 is: 76,435.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,675.91 : 129,834.78 = 51,027.39 : x
  2. Step 2: Convert to fraction form
    86,675.91/129,834.78 = 51,027.39/x
  3. Step 3: Cross multiply
    86,675.91x = 129,834.78 × 51,027.39
  4. Step 4: Simplify right side
    86,675.91x = 6,625,129,954.62
  5. Step 5: Solve for x
    x = 6,625,129,954.62/86,675.91
  6. Step 6: Final answer
    x = 76,435.66

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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.