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Finding the Fourth Proportional to 116, 173.68 and 79.76

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Solution

The fourth proportional to 116, 173.68 and 79.76 is: 119.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    116 : 173.68 = 79.76 : x
  2. Step 2: Convert to fraction form
    116/173.68 = 79.76/x
  3. Step 3: Cross multiply
    116x = 173.68 × 79.76
  4. Step 4: Simplify right side
    116x = 13,852.72
  5. Step 5: Solve for x
    x = 13,852.72/116
  6. Step 6: Final answer
    x = 119.42

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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.