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Finding the Fourth Proportional to 82.34, 122.92 and 75.32

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Solution

The fourth proportional to 82.34, 122.92 and 75.32 is: 112.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.34 : 122.92 = 75.32 : x
  2. Step 2: Convert to fraction form
    82.34/122.92 = 75.32/x
  3. Step 3: Cross multiply
    82.34x = 122.92 × 75.32
  4. Step 4: Simplify right side
    82.34x = 9,258.33
  5. Step 5: Solve for x
    x = 9,258.33/82.34
  6. Step 6: Final answer
    x = 112.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.