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Finding the Fourth Proportional to 162.57, 224.30 and 103.56

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Solution

The fourth proportional to 162.57, 224.30 and 103.56 is: 142.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.57 : 224.30 = 103.56 : x
  2. Step 2: Convert to fraction form
    162.57/224.30 = 103.56/x
  3. Step 3: Cross multiply
    162.57x = 224.30 × 103.56
  4. Step 4: Simplify right side
    162.57x = 23,227.99
  5. Step 5: Solve for x
    x = 23,227.99/162.57
  6. Step 6: Final answer
    x = 142.88

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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.