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Finding the Third Proportional to 61,576 and 90,169

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Solution

The third proportional to 61,576 and 90,169 is: 132,039.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,576 : 90,169 = 90,169 : x
  2. Step 2: Convert to fraction form
    61,576/90,169 = 90,169/x
  3. Step 3: Cross multiply
    61,576x = 90,169 × 90,169
  4. Step 4: Simplify right side
    61,576x = 8,130,448,561
  5. Step 5: Solve for x
    x = 8,130,448,561/61,576
  6. Step 6: Final answer
    x = 132,039.25

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.