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Finding the Fourth Proportional to 106.88, 160.67 and 87.76

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Solution

The fourth proportional to 106.88, 160.67 and 87.76 is: 131.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.88 : 160.67 = 87.76 : x
  2. Step 2: Convert to fraction form
    106.88/160.67 = 87.76/x
  3. Step 3: Cross multiply
    106.88x = 160.67 × 87.76
  4. Step 4: Simplify right side
    106.88x = 14,100.24
  5. Step 5: Solve for x
    x = 14,100.24/106.88
  6. Step 6: Final answer
    x = 131.93

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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.