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Finding the Fourth Proportional to 124.64, 185.62 and 121.44

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Solution

The fourth proportional to 124.64, 185.62 and 121.44 is: 180.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.64 : 185.62 = 121.44 : x
  2. Step 2: Convert to fraction form
    124.64/185.62 = 121.44/x
  3. Step 3: Cross multiply
    124.64x = 185.62 × 121.44
  4. Step 4: Simplify right side
    124.64x = 22,541.69
  5. Step 5: Solve for x
    x = 22,541.69/124.64
  6. Step 6: Final answer
    x = 180.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.