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Finding the Fourth Proportional to 113.49, 155.60 and 110.45

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Solution

The fourth proportional to 113.49, 155.60 and 110.45 is: 151.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.49 : 155.60 = 110.45 : x
  2. Step 2: Convert to fraction form
    113.49/155.60 = 110.45/x
  3. Step 3: Cross multiply
    113.49x = 155.60 × 110.45
  4. Step 4: Simplify right side
    113.49x = 17,186.02
  5. Step 5: Solve for x
    x = 17,186.02/113.49
  6. Step 6: Final answer
    x = 151.43

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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.