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Finding the Fourth Proportional to 162.48, 243.40 and 116.72

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Solution

The fourth proportional to 162.48, 243.40 and 116.72 is: 174.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.48 : 243.40 = 116.72 : x
  2. Step 2: Convert to fraction form
    162.48/243.40 = 116.72/x
  3. Step 3: Cross multiply
    162.48x = 243.40 × 116.72
  4. Step 4: Simplify right side
    162.48x = 28,409.65
  5. Step 5: Solve for x
    x = 28,409.65/162.48
  6. Step 6: Final answer
    x = 174.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.