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Finding the Fourth Proportional to 116.29, 174.07 and 77.79

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Solution

The fourth proportional to 116.29, 174.07 and 77.79 is: 116.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.29 : 174.07 = 77.79 : x
  2. Step 2: Convert to fraction form
    116.29/174.07 = 77.79/x
  3. Step 3: Cross multiply
    116.29x = 174.07 × 77.79
  4. Step 4: Simplify right side
    116.29x = 13,540.71
  5. Step 5: Solve for x
    x = 13,540.71/116.29
  6. Step 6: Final answer
    x = 116.44

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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.