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Finding the Fourth Proportional to 179.51, 247.74 and 124.28

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Solution

The fourth proportional to 179.51, 247.74 and 124.28 is: 171.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.51 : 247.74 = 124.28 : x
  2. Step 2: Convert to fraction form
    179.51/247.74 = 124.28/x
  3. Step 3: Cross multiply
    179.51x = 247.74 × 124.28
  4. Step 4: Simplify right side
    179.51x = 30,787.89
  5. Step 5: Solve for x
    x = 30,787.89/179.51
  6. Step 6: Final answer
    x = 171.52

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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.