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Finding the Fourth Proportional to 113.88, 155.94 and 110.40

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Solution

The fourth proportional to 113.88, 155.94 and 110.40 is: 151.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.88 : 155.94 = 110.40 : x
  2. Step 2: Convert to fraction form
    113.88/155.94 = 110.40/x
  3. Step 3: Cross multiply
    113.88x = 155.94 × 110.40
  4. Step 4: Simplify right side
    113.88x = 17,215.78
  5. Step 5: Solve for x
    x = 17,215.78/113.88
  6. Step 6: Final answer
    x = 151.17

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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.