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Finding the Fourth Proportional to 163.32, 243.87 and 145.08

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Solution

The fourth proportional to 163.32, 243.87 and 145.08 is: 216.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.32 : 243.87 = 145.08 : x
  2. Step 2: Convert to fraction form
    163.32/243.87 = 145.08/x
  3. Step 3: Cross multiply
    163.32x = 243.87 × 145.08
  4. Step 4: Simplify right side
    163.32x = 35,380.66
  5. Step 5: Solve for x
    x = 35,380.66/163.32
  6. Step 6: Final answer
    x = 216.63

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.