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Finding the Fourth Proportional to 163.52, 245.17 and 72.17

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Solution

The fourth proportional to 163.52, 245.17 and 72.17 is: 108.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.52 : 245.17 = 72.17 : x
  2. Step 2: Convert to fraction form
    163.52/245.17 = 72.17/x
  3. Step 3: Cross multiply
    163.52x = 245.17 × 72.17
  4. Step 4: Simplify right side
    163.52x = 17,693.92
  5. Step 5: Solve for x
    x = 17,693.92/163.52
  6. Step 6: Final answer
    x = 108.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.