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Finding the Fourth Proportional to 113.78, 170.46 and 55.94

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Solution

The fourth proportional to 113.78, 170.46 and 55.94 is: 83.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.78 : 170.46 = 55.94 : x
  2. Step 2: Convert to fraction form
    113.78/170.46 = 55.94/x
  3. Step 3: Cross multiply
    113.78x = 170.46 × 55.94
  4. Step 4: Simplify right side
    113.78x = 9,535.53
  5. Step 5: Solve for x
    x = 9,535.53/113.78
  6. Step 6: Final answer
    x = 83.81

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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.