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Finding the Fourth Proportional to 162.92, 224.77 and 99.87

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Solution

The fourth proportional to 162.92, 224.77 and 99.87 is: 137.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.92 : 224.77 = 99.87 : x
  2. Step 2: Convert to fraction form
    162.92/224.77 = 99.87/x
  3. Step 3: Cross multiply
    162.92x = 224.77 × 99.87
  4. Step 4: Simplify right side
    162.92x = 22,447.28
  5. Step 5: Solve for x
    x = 22,447.28/162.92
  6. Step 6: Final answer
    x = 137.79

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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.