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Finding the Fourth Proportional to 162.05, 223.49 and 99.87

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Solution

The fourth proportional to 162.05, 223.49 and 99.87 is: 137.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.05 : 223.49 = 99.87 : x
  2. Step 2: Convert to fraction form
    162.05/223.49 = 99.87/x
  3. Step 3: Cross multiply
    162.05x = 223.49 × 99.87
  4. Step 4: Simplify right side
    162.05x = 22,319.95
  5. Step 5: Solve for x
    x = 22,319.95/162.05
  6. Step 6: Final answer
    x = 137.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.