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Finding the Fourth Proportional to 86,551.71, 129,814.57 and 27,379.69

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Solution

The fourth proportional to 86,551.71, 129,814.57 and 27,379.69 is: 41,065.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,551.71 : 129,814.57 = 27,379.69 : x
  2. Step 2: Convert to fraction form
    86,551.71/129,814.57 = 27,379.69/x
  3. Step 3: Cross multiply
    86,551.71x = 129,814.57 × 27,379.69
  4. Step 4: Simplify right side
    86,551.71x = 3,554,282,684.08
  5. Step 5: Solve for x
    x = 3,554,282,684.08/86,551.71
  6. Step 6: Final answer
    x = 41,065.42

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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.