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Finding the Third Proportional to 43,320 and 66,140

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Solution

The third proportional to 43,320 and 66,140 is: 100,981.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,320 : 66,140 = 66,140 : x
  2. Step 2: Convert to fraction form
    43,320/66,140 = 66,140/x
  3. Step 3: Cross multiply
    43,320x = 66,140 × 66,140
  4. Step 4: Simplify right side
    43,320x = 4,374,499,600
  5. Step 5: Solve for x
    x = 4,374,499,600/43,320
  6. Step 6: Final answer
    x = 100,981.06

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.