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Finding the Third Proportional to 42,930 and 66,723.75

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Solution

The third proportional to 42,930 and 66,723.75 is: 103,705.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,930 : 66,723.75 = 66,723.75 : x
  2. Step 2: Convert to fraction form
    42,930/66,723.75 = 66,723.75/x
  3. Step 3: Cross multiply
    42,930x = 66,723.75 × 66,723.75
  4. Step 4: Simplify right side
    42,930x = 4,452,058,814.06
  5. Step 5: Solve for x
    x = 4,452,058,814.06/42,930
  6. Step 6: Final answer
    x = 103,705.07

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.