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Finding the Fourth Proportional to 77,115.62, 115,673.43 and 27,169.40

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Solution

The fourth proportional to 77,115.62, 115,673.43 and 27,169.40 is: 40,754.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,115.62 : 115,673.43 = 27,169.40 : x
  2. Step 2: Convert to fraction form
    77,115.62/115,673.43 = 27,169.40/x
  3. Step 3: Cross multiply
    77,115.62x = 115,673.43 × 27,169.40
  4. Step 4: Simplify right side
    77,115.62x = 3,142,777,689.04
  5. Step 5: Solve for x
    x = 3,142,777,689.04/77,115.62
  6. Step 6: Final answer
    x = 40,754.10

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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.