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Finding the Fourth Proportional to 113.20, 170.57 and 104.36

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Solution

The fourth proportional to 113.20, 170.57 and 104.36 is: 157.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.20 : 170.57 = 104.36 : x
  2. Step 2: Convert to fraction form
    113.20/170.57 = 104.36/x
  3. Step 3: Cross multiply
    113.20x = 170.57 × 104.36
  4. Step 4: Simplify right side
    113.20x = 17,800.09
  5. Step 5: Solve for x
    x = 17,800.09/113.20
  6. Step 6: Final answer
    x = 157.25

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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.