Home / 77,072.28-115,617.69-27,142.06

Finding the Fourth Proportional to 77,072.28, 115,617.69 and 27,142.06

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Solution

The fourth proportional to 77,072.28, 115,617.69 and 27,142.06 is: 40,716.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,072.28 : 115,617.69 = 27,142.06 : x
  2. Step 2: Convert to fraction form
    77,072.28/115,617.69 = 27,142.06/x
  3. Step 3: Cross multiply
    77,072.28x = 115,617.69 × 27,142.06
  4. Step 4: Simplify right side
    77,072.28x = 3,138,102,279.04
  5. Step 5: Solve for x
    x = 3,138,102,279.04/77,072.28
  6. Step 6: Final answer
    x = 40,716.35

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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.