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Finding the Third Proportional to 42,687 and 66,966.75

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Solution

The third proportional to 42,687 and 66,966.75 is: 105,056.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,687 : 66,966.75 = 66,966.75 : x
  2. Step 2: Convert to fraction form
    42,687/66,966.75 = 66,966.75/x
  3. Step 3: Cross multiply
    42,687x = 66,966.75 × 66,966.75
  4. Step 4: Simplify right side
    42,687x = 4,484,545,605.56
  5. Step 5: Solve for x
    x = 4,484,545,605.56/42,687
  6. Step 6: Final answer
    x = 105,056.47

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.