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Finding the Fourth Proportional to 113.45, 170.25 and 55.71

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Solution

The fourth proportional to 113.45, 170.25 and 55.71 is: 83.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.45 : 170.25 = 55.71 : x
  2. Step 2: Convert to fraction form
    113.45/170.25 = 55.71/x
  3. Step 3: Cross multiply
    113.45x = 170.25 × 55.71
  4. Step 4: Simplify right side
    113.45x = 9,485.21
  5. Step 5: Solve for x
    x = 9,485.21/113.45
  6. Step 6: Final answer
    x = 83.61

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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.