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Finding the Third Proportional to 31,160 and 66,748

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Solution

The third proportional to 31,160 and 66,748 is: 142,981.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,160 : 66,748 = 66,748 : x
  2. Step 2: Convert to fraction form
    31,160/66,748 = 66,748/x
  3. Step 3: Cross multiply
    31,160x = 66,748 × 66,748
  4. Step 4: Simplify right side
    31,160x = 4,455,295,504
  5. Step 5: Solve for x
    x = 4,455,295,504/31,160
  6. Step 6: Final answer
    x = 142,981.24

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.