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Finding the Fourth Proportional to 116.17, 160.18 and 76.86

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Solution

The fourth proportional to 116.17, 160.18 and 76.86 is: 105.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.17 : 160.18 = 76.86 : x
  2. Step 2: Convert to fraction form
    116.17/160.18 = 76.86/x
  3. Step 3: Cross multiply
    116.17x = 160.18 × 76.86
  4. Step 4: Simplify right side
    116.17x = 12,311.43
  5. Step 5: Solve for x
    x = 12,311.43/116.17
  6. Step 6: Final answer
    x = 105.98

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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.