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Finding the Fourth Proportional to 124.28, 185.41 and 118.20

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Solution

The fourth proportional to 124.28, 185.41 and 118.20 is: 176.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.28 : 185.41 = 118.20 : x
  2. Step 2: Convert to fraction form
    124.28/185.41 = 118.20/x
  3. Step 3: Cross multiply
    124.28x = 185.41 × 118.20
  4. Step 4: Simplify right side
    124.28x = 21,915.46
  5. Step 5: Solve for x
    x = 21,915.46/124.28
  6. Step 6: Final answer
    x = 176.34

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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.