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Finding the Fourth Proportional to 162.29, 223.72 and 142.70

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Solution

The fourth proportional to 162.29, 223.72 and 142.70 is: 196.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.29 : 223.72 = 142.70 : x
  2. Step 2: Convert to fraction form
    162.29/223.72 = 142.70/x
  3. Step 3: Cross multiply
    162.29x = 223.72 × 142.70
  4. Step 4: Simplify right side
    162.29x = 31,924.84
  5. Step 5: Solve for x
    x = 31,924.84/162.29
  6. Step 6: Final answer
    x = 196.71

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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.