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Finding the Third Proportional to 25 and 55.50

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Solution

The third proportional to 25 and 55.50 is: 123.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    25 : 55.50 = 55.50 : x
  2. Step 2: Convert to fraction form
    25/55.50 = 55.50/x
  3. Step 3: Cross multiply
    25x = 55.50 × 55.50
  4. Step 4: Simplify right side
    25x = 3,080.25
  5. Step 5: Solve for x
    x = 3,080.25/25
  6. Step 6: Final answer
    x = 123.21

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Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.