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Finding the Third Proportional to 55,220 and 87,576

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Solution

The third proportional to 55,220 and 87,576 is: 138,890.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,220 : 87,576 = 87,576 : x
  2. Step 2: Convert to fraction form
    55,220/87,576 = 87,576/x
  3. Step 3: Cross multiply
    55,220x = 87,576 × 87,576
  4. Step 4: Simplify right side
    55,220x = 7,669,555,776
  5. Step 5: Solve for x
    x = 7,669,555,776/55,220
  6. Step 6: Final answer
    x = 138,890.91

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.