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Finding the Fourth Proportional to 115,672.66, 159,668.42 and 79,493.91

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Solution

The fourth proportional to 115,672.66, 159,668.42 and 79,493.91 is: 109,729.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,672.66 : 159,668.42 = 79,493.91 : x
  2. Step 2: Convert to fraction form
    115,672.66/159,668.42 = 79,493.91/x
  3. Step 3: Cross multiply
    115,672.66x = 159,668.42 × 79,493.91
  4. Step 4: Simplify right side
    115,672.66x = 12,692,666,013.10
  5. Step 5: Solve for x
    x = 12,692,666,013.10/115,672.66
  6. Step 6: Final answer
    x = 109,729.18

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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.