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Finding the Fourth Proportional to 162.88, 244.43 and 66.71

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Solution

The fourth proportional to 162.88, 244.43 and 66.71 is: 100.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.88 : 244.43 = 66.71 : x
  2. Step 2: Convert to fraction form
    162.88/244.43 = 66.71/x
  3. Step 3: Cross multiply
    162.88x = 244.43 × 66.71
  4. Step 4: Simplify right side
    162.88x = 16,305.93
  5. Step 5: Solve for x
    x = 16,305.93/162.88
  6. Step 6: Final answer
    x = 100.11

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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.