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Finding the Fourth Proportional to 110.13, 151.84 and 90.39

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Solution

The fourth proportional to 110.13, 151.84 and 90.39 is: 124.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.13 : 151.84 = 90.39 : x
  2. Step 2: Convert to fraction form
    110.13/151.84 = 90.39/x
  3. Step 3: Cross multiply
    110.13x = 151.84 × 90.39
  4. Step 4: Simplify right side
    110.13x = 13,724.82
  5. Step 5: Solve for x
    x = 13,724.82/110.13
  6. Step 6: Final answer
    x = 124.62

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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.