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Finding the Fourth Proportional to 111.16, 166.63 and 88.39

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Solution

The fourth proportional to 111.16, 166.63 and 88.39 is: 132.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.16 : 166.63 = 88.39 : x
  2. Step 2: Convert to fraction form
    111.16/166.63 = 88.39/x
  3. Step 3: Cross multiply
    111.16x = 166.63 × 88.39
  4. Step 4: Simplify right side
    111.16x = 14,728.43
  5. Step 5: Solve for x
    x = 14,728.43/111.16
  6. Step 6: Final answer
    x = 132.50

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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.