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Finding the Fourth Proportional to 163.05, 244.48 and 128.71

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Solution

The fourth proportional to 163.05, 244.48 and 128.71 is: 192.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.05 : 244.48 = 128.71 : x
  2. Step 2: Convert to fraction form
    163.05/244.48 = 128.71/x
  3. Step 3: Cross multiply
    163.05x = 244.48 × 128.71
  4. Step 4: Simplify right side
    163.05x = 31,465.80
  5. Step 5: Solve for x
    x = 31,465.80/163.05
  6. Step 6: Final answer
    x = 192.98

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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.