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Finding the Fourth Proportional to 111.87, 153.29 and 110.43

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Solution

The fourth proportional to 111.87, 153.29 and 110.43 is: 151.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.87 : 153.29 = 110.43 : x
  2. Step 2: Convert to fraction form
    111.87/153.29 = 110.43/x
  3. Step 3: Cross multiply
    111.87x = 153.29 × 110.43
  4. Step 4: Simplify right side
    111.87x = 16,927.26
  5. Step 5: Solve for x
    x = 16,927.26/111.87
  6. Step 6: Final answer
    x = 151.31

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.