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Finding the Fourth Proportional to 113.29, 155.99 and 97.72

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Solution

The fourth proportional to 113.29, 155.99 and 97.72 is: 134.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.29 : 155.99 = 97.72 : x
  2. Step 2: Convert to fraction form
    113.29/155.99 = 97.72/x
  3. Step 3: Cross multiply
    113.29x = 155.99 × 97.72
  4. Step 4: Simplify right side
    113.29x = 15,243.20
  5. Step 5: Solve for x
    x = 15,243.20/113.29
  6. Step 6: Final answer
    x = 134.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.