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Finding the Fourth Proportional to 188.50, 283.28 and 124.78

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Solution

The fourth proportional to 188.50, 283.28 and 124.78 is: 187.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.50 : 283.28 = 124.78 : x
  2. Step 2: Convert to fraction form
    188.50/283.28 = 124.78/x
  3. Step 3: Cross multiply
    188.50x = 283.28 × 124.78
  4. Step 4: Simplify right side
    188.50x = 35,347.68
  5. Step 5: Solve for x
    x = 35,347.68/188.50
  6. Step 6: Final answer
    x = 187.52

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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.