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Finding the Fourth Proportional to 79,987.80, 119,949.30 and 27,370.20

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Solution

The fourth proportional to 79,987.80, 119,949.30 and 27,370.20 is: 41,044.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,987.80 : 119,949.30 = 27,370.20 : x
  2. Step 2: Convert to fraction form
    79,987.80/119,949.30 = 27,370.20/x
  3. Step 3: Cross multiply
    79,987.80x = 119,949.30 × 27,370.20
  4. Step 4: Simplify right side
    79,987.80x = 3,283,036,330.86
  5. Step 5: Solve for x
    x = 3,283,036,330.86/79,987.80
  6. Step 6: Final answer
    x = 41,044.21

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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.