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Finding the Fourth Proportional to 88.18, 131.96 and 67.77

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Solution

The fourth proportional to 88.18, 131.96 and 67.77 is: 101.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.18 : 131.96 = 67.77 : x
  2. Step 2: Convert to fraction form
    88.18/131.96 = 67.77/x
  3. Step 3: Cross multiply
    88.18x = 131.96 × 67.77
  4. Step 4: Simplify right side
    88.18x = 8,943.10
  5. Step 5: Solve for x
    x = 8,943.10/88.18
  6. Step 6: Final answer
    x = 101.42

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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.