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Finding the Third Proportional to 68,172 and 145,820

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Solution

The third proportional to 68,172 and 145,820 is: 311,909.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,172 : 145,820 = 145,820 : x
  2. Step 2: Convert to fraction form
    68,172/145,820 = 145,820/x
  3. Step 3: Cross multiply
    68,172x = 145,820 × 145,820
  4. Step 4: Simplify right side
    68,172x = 21,263,472,400
  5. Step 5: Solve for x
    x = 21,263,472,400/68,172
  6. Step 6: Final answer
    x = 311,909.18

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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.