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Finding the Fourth Proportional to 163.60, 225.36 and 124.72

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Solution

The fourth proportional to 163.60, 225.36 and 124.72 is: 171.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.60 : 225.36 = 124.72 : x
  2. Step 2: Convert to fraction form
    163.60/225.36 = 124.72/x
  3. Step 3: Cross multiply
    163.60x = 225.36 × 124.72
  4. Step 4: Simplify right side
    163.60x = 28,106.90
  5. Step 5: Solve for x
    x = 28,106.90/163.60
  6. Step 6: Final answer
    x = 171.80

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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.