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Finding the Fourth Proportional to 113.88, 170.04 and 103.62

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Solution

The fourth proportional to 113.88, 170.04 and 103.62 is: 154.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.88 : 170.04 = 103.62 : x
  2. Step 2: Convert to fraction form
    113.88/170.04 = 103.62/x
  3. Step 3: Cross multiply
    113.88x = 170.04 × 103.62
  4. Step 4: Simplify right side
    113.88x = 17,619.54
  5. Step 5: Solve for x
    x = 17,619.54/113.88
  6. Step 6: Final answer
    x = 154.72

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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.