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Finding the Fourth Proportional to 113.11, 170.33 and 100.39

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Solution

The fourth proportional to 113.11, 170.33 and 100.39 is: 151.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.11 : 170.33 = 100.39 : x
  2. Step 2: Convert to fraction form
    113.11/170.33 = 100.39/x
  3. Step 3: Cross multiply
    113.11x = 170.33 × 100.39
  4. Step 4: Simplify right side
    113.11x = 17,098.58
  5. Step 5: Solve for x
    x = 17,098.58/113.11
  6. Step 6: Final answer
    x = 151.17

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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.