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Finding the Fourth Proportional to 162.45, 224.04 and 115.86

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Solution

The fourth proportional to 162.45, 224.04 and 115.86 is: 159.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.45 : 224.04 = 115.86 : x
  2. Step 2: Convert to fraction form
    162.45/224.04 = 115.86/x
  3. Step 3: Cross multiply
    162.45x = 224.04 × 115.86
  4. Step 4: Simplify right side
    162.45x = 25,957.27
  5. Step 5: Solve for x
    x = 25,957.27/162.45
  6. Step 6: Final answer
    x = 159.79

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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.