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Finding the Fourth Proportional to 86,579.58, 129,882.72 and 36,660

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Solution

The fourth proportional to 86,579.58, 129,882.72 and 36,660 is: 54,995.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,579.58 : 129,882.72 = 36,660 : x
  2. Step 2: Convert to fraction form
    86,579.58/129,882.72 = 36,660/x
  3. Step 3: Cross multiply
    86,579.58x = 129,882.72 × 36,660
  4. Step 4: Simplify right side
    86,579.58x = 4,761,500,515.20
  5. Step 5: Solve for x
    x = 4,761,500,515.20/86,579.58
  6. Step 6: Final answer
    x = 54,995.65

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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.