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Finding the Fourth Proportional to 86,470.63, 129,709.92 and 26,494.81

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Solution

The fourth proportional to 86,470.63, 129,709.92 and 26,494.81 is: 39,743.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,470.63 : 129,709.92 = 26,494.81 : x
  2. Step 2: Convert to fraction form
    86,470.63/129,709.92 = 26,494.81/x
  3. Step 3: Cross multiply
    86,470.63x = 129,709.92 × 26,494.81
  4. Step 4: Simplify right side
    86,470.63x = 3,436,639,685.52
  5. Step 5: Solve for x
    x = 3,436,639,685.52/86,470.63
  6. Step 6: Final answer
    x = 39,743.43

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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.