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Finding the Fourth Proportional to 110.87, 152.86 and 91.13

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Solution

The fourth proportional to 110.87, 152.86 and 91.13 is: 125.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.87 : 152.86 = 91.13 : x
  2. Step 2: Convert to fraction form
    110.87/152.86 = 91.13/x
  3. Step 3: Cross multiply
    110.87x = 152.86 × 91.13
  4. Step 4: Simplify right side
    110.87x = 13,929.14
  5. Step 5: Solve for x
    x = 13,929.14/110.87
  6. Step 6: Final answer
    x = 125.64

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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.