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Finding the Fourth Proportional to 163.99, 245.82 and 72.66

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Solution

The fourth proportional to 163.99, 245.82 and 72.66 is: 108.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.99 : 245.82 = 72.66 : x
  2. Step 2: Convert to fraction form
    163.99/245.82 = 72.66/x
  3. Step 3: Cross multiply
    163.99x = 245.82 × 72.66
  4. Step 4: Simplify right side
    163.99x = 17,861.28
  5. Step 5: Solve for x
    x = 17,861.28/163.99
  6. Step 6: Final answer
    x = 108.92

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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.