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Finding the Fourth Proportional to 86,491.96, 129,755.45 and 36,571.97

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Solution

The fourth proportional to 86,491.96, 129,755.45 and 36,571.97 is: 54,865.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,491.96 : 129,755.45 = 36,571.97 : x
  2. Step 2: Convert to fraction form
    86,491.96/129,755.45 = 36,571.97/x
  3. Step 3: Cross multiply
    86,491.96x = 129,755.45 × 36,571.97
  4. Step 4: Simplify right side
    86,491.96x = 4,745,412,424.74
  5. Step 5: Solve for x
    x = 4,745,412,424.74/86,491.96
  6. Step 6: Final answer
    x = 54,865.36

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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.