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Finding the Third Proportional to 31,300 and 66,088

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Solution

The third proportional to 31,300 and 66,088 is: 139,540.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,300 : 66,088 = 66,088 : x
  2. Step 2: Convert to fraction form
    31,300/66,088 = 66,088/x
  3. Step 3: Cross multiply
    31,300x = 66,088 × 66,088
  4. Step 4: Simplify right side
    31,300x = 4,367,623,744
  5. Step 5: Solve for x
    x = 4,367,623,744/31,300
  6. Step 6: Final answer
    x = 139,540.69

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.