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Finding the Fourth Proportional to 86,491.72, 129,736.81 and 27,327.40

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Solution

The fourth proportional to 86,491.72, 129,736.81 and 27,327.40 is: 40,990.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,491.72 : 129,736.81 = 27,327.40 : x
  2. Step 2: Convert to fraction form
    86,491.72/129,736.81 = 27,327.40/x
  3. Step 3: Cross multiply
    86,491.72x = 129,736.81 × 27,327.40
  4. Step 4: Simplify right side
    86,491.72x = 3,545,369,701.59
  5. Step 5: Solve for x
    x = 3,545,369,701.59/86,491.72
  6. Step 6: Final answer
    x = 40,990.86

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1.5x scale

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.