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Finding the Fourth Proportional to 67, 100.50 and 28.51

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Solution

The fourth proportional to 67, 100.50 and 28.51 is: 42.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    67 : 100.50 = 28.51 : x
  2. Step 2: Convert to fraction form
    67/100.50 = 28.51/x
  3. Step 3: Cross multiply
    67x = 100.50 × 28.51
  4. Step 4: Simplify right side
    67x = 2,865.26
  5. Step 5: Solve for x
    x = 2,865.26/67
  6. Step 6: Final answer
    x = 42.77

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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.