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Finding the Third Proportional to 55.69 and 70.88

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Solution

The third proportional to 55.69 and 70.88 is: 90.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.69 : 70.88 = 70.88 : x
  2. Step 2: Convert to fraction form
    55.69/70.88 = 70.88/x
  3. Step 3: Cross multiply
    55.69x = 70.88 × 70.88
  4. Step 4: Simplify right side
    55.69x = 5,023.27
  5. Step 5: Solve for x
    x = 5,023.27/55.69
  6. Step 6: Final answer
    x = 90.20

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Why These Related Problems?

These problems maintain the same ratio (1.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.