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Finding the Fourth Proportional to 113.31, 155.52 and 102.33

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Solution

The fourth proportional to 113.31, 155.52 and 102.33 is: 140.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.31 : 155.52 = 102.33 : x
  2. Step 2: Convert to fraction form
    113.31/155.52 = 102.33/x
  3. Step 3: Cross multiply
    113.31x = 155.52 × 102.33
  4. Step 4: Simplify right side
    113.31x = 15,914.36
  5. Step 5: Solve for x
    x = 15,914.36/113.31
  6. Step 6: Final answer
    x = 140.45

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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.