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Finding the Third Proportional to 78,930 and 170,988

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Solution

The third proportional to 78,930 and 170,988 is: 370,415.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,930 : 170,988 = 170,988 : x
  2. Step 2: Convert to fraction form
    78,930/170,988 = 170,988/x
  3. Step 3: Cross multiply
    78,930x = 170,988 × 170,988
  4. Step 4: Simplify right side
    78,930x = 29,236,896,144
  5. Step 5: Solve for x
    x = 29,236,896,144/78,930
  6. Step 6: Final answer
    x = 370,415.51

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.