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Finding the Fourth Proportional to 162.86, 224.42 and 121.36

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Solution

The fourth proportional to 162.86, 224.42 and 121.36 is: 167.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.86 : 224.42 = 121.36 : x
  2. Step 2: Convert to fraction form
    162.86/224.42 = 121.36/x
  3. Step 3: Cross multiply
    162.86x = 224.42 × 121.36
  4. Step 4: Simplify right side
    162.86x = 27,235.61
  5. Step 5: Solve for x
    x = 27,235.61/162.86
  6. Step 6: Final answer
    x = 167.23

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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.