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Finding the Fourth Proportional to 102.92, 154.97 and 76.06

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Solution

The fourth proportional to 102.92, 154.97 and 76.06 is: 114.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.92 : 154.97 = 76.06 : x
  2. Step 2: Convert to fraction form
    102.92/154.97 = 76.06/x
  3. Step 3: Cross multiply
    102.92x = 154.97 × 76.06
  4. Step 4: Simplify right side
    102.92x = 11,787.02
  5. Step 5: Solve for x
    x = 11,787.02/102.92
  6. Step 6: Final answer
    x = 114.53

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.