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Finding the Third Proportional to 55,276 and 85,740

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Solution

The third proportional to 55,276 and 85,740 is: 132,993.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,276 : 85,740 = 85,740 : x
  2. Step 2: Convert to fraction form
    55,276/85,740 = 85,740/x
  3. Step 3: Cross multiply
    55,276x = 85,740 × 85,740
  4. Step 4: Simplify right side
    55,276x = 7,351,347,600
  5. Step 5: Solve for x
    x = 7,351,347,600/55,276
  6. Step 6: Final answer
    x = 132,993.48

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.