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Finding the Fourth Proportional to 79,601.88, 109,851.12 and 43,791

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Solution

The fourth proportional to 79,601.88, 109,851.12 and 43,791 is: 60,431.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,601.88 : 109,851.12 = 43,791 : x
  2. Step 2: Convert to fraction form
    79,601.88/109,851.12 = 43,791/x
  3. Step 3: Cross multiply
    79,601.88x = 109,851.12 × 43,791
  4. Step 4: Simplify right side
    79,601.88x = 4,810,490,395.92
  5. Step 5: Solve for x
    x = 4,810,490,395.92/79,601.88
  6. Step 6: Final answer
    x = 60,431.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.