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Finding the Third Proportional to 68.75 and 101.50

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Solution

The third proportional to 68.75 and 101.50 is: 149.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.75 : 101.50 = 101.50 : x
  2. Step 2: Convert to fraction form
    68.75/101.50 = 101.50/x
  3. Step 3: Cross multiply
    68.75x = 101.50 × 101.50
  4. Step 4: Simplify right side
    68.75x = 10,302.25
  5. Step 5: Solve for x
    x = 10,302.25/68.75
  6. Step 6: Final answer
    x = 149.85

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.