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Finding the Fourth Proportional to 163.60, 225.60 and 113.87

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Solution

The fourth proportional to 163.60, 225.60 and 113.87 is: 157.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.60 : 225.60 = 113.87 : x
  2. Step 2: Convert to fraction form
    163.60/225.60 = 113.87/x
  3. Step 3: Cross multiply
    163.60x = 225.60 × 113.87
  4. Step 4: Simplify right side
    163.60x = 25,689.22
  5. Step 5: Solve for x
    x = 25,689.22/163.60
  6. Step 6: Final answer
    x = 157.02

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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.