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Finding the Fourth Proportional to 162.61, 243.60 and 122.20

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Solution

The fourth proportional to 162.61, 243.60 and 122.20 is: 183.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.61 : 243.60 = 122.20 : x
  2. Step 2: Convert to fraction form
    162.61/243.60 = 122.20/x
  3. Step 3: Cross multiply
    162.61x = 243.60 × 122.20
  4. Step 4: Simplify right side
    162.61x = 29,767.92
  5. Step 5: Solve for x
    x = 29,767.92/162.61
  6. Step 6: Final answer
    x = 183.06

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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.