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Finding the Third Proportional to 108.75 and 143.75

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Solution

The third proportional to 108.75 and 143.75 is: 190.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.75 : 143.75 = 143.75 : x
  2. Step 2: Convert to fraction form
    108.75/143.75 = 143.75/x
  3. Step 3: Cross multiply
    108.75x = 143.75 × 143.75
  4. Step 4: Simplify right side
    108.75x = 20,664.06
  5. Step 5: Solve for x
    x = 20,664.06/108.75
  6. Step 6: Final answer
    x = 190.01

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.