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Finding the Fourth Proportional to 110.60, 166.59 and 90.56

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Solution

The fourth proportional to 110.60, 166.59 and 90.56 is: 136.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.60 : 166.59 = 90.56 : x
  2. Step 2: Convert to fraction form
    110.60/166.59 = 90.56/x
  3. Step 3: Cross multiply
    110.60x = 166.59 × 90.56
  4. Step 4: Simplify right side
    110.60x = 15,085.56
  5. Step 5: Solve for x
    x = 15,085.56/110.60
  6. Step 6: Final answer
    x = 136.40

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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.