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Finding the Third Proportional to 66,810 and 155,360

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Solution

The third proportional to 66,810 and 155,360 is: 361,274.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,810 : 155,360 = 155,360 : x
  2. Step 2: Convert to fraction form
    66,810/155,360 = 155,360/x
  3. Step 3: Cross multiply
    66,810x = 155,360 × 155,360
  4. Step 4: Simplify right side
    66,810x = 24,136,729,600
  5. Step 5: Solve for x
    x = 24,136,729,600/66,810
  6. Step 6: Final answer
    x = 361,274.20

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Why These Related Problems?

These problems maintain the same ratio (2.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.