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Finding the Fourth Proportional to 113.46, 156.60 and 112.02

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Solution

The fourth proportional to 113.46, 156.60 and 112.02 is: 154.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.46 : 156.60 = 112.02 : x
  2. Step 2: Convert to fraction form
    113.46/156.60 = 112.02/x
  3. Step 3: Cross multiply
    113.46x = 156.60 × 112.02
  4. Step 4: Simplify right side
    113.46x = 17,542.33
  5. Step 5: Solve for x
    x = 17,542.33/113.46
  6. Step 6: Final answer
    x = 154.61

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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.