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Finding the Third Proportional to 72 and 85.88

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Solution

The third proportional to 72 and 85.88 is: 102.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    72 : 85.88 = 85.88 : x
  2. Step 2: Convert to fraction form
    72/85.88 = 85.88/x
  3. Step 3: Cross multiply
    72x = 85.88 × 85.88
  4. Step 4: Simplify right side
    72x = 7,374.52
  5. Step 5: Solve for x
    x = 7,374.52/72
  6. Step 6: Final answer
    x = 102.42

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Why These Related Problems?

These problems maintain the same ratio (1.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.