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Finding the Fourth Proportional to 110.26, 151.90 and 90.82

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Solution

The fourth proportional to 110.26, 151.90 and 90.82 is: 125.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.26 : 151.90 = 90.82 : x
  2. Step 2: Convert to fraction form
    110.26/151.90 = 90.82/x
  3. Step 3: Cross multiply
    110.26x = 151.90 × 90.82
  4. Step 4: Simplify right side
    110.26x = 13,795.56
  5. Step 5: Solve for x
    x = 13,795.56/110.26
  6. Step 6: Final answer
    x = 125.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.