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Finding the Third Proportional to 74,720 and 155,776

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Solution

The third proportional to 74,720 and 155,776 is: 324,761.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,720 : 155,776 = 155,776 : x
  2. Step 2: Convert to fraction form
    74,720/155,776 = 155,776/x
  3. Step 3: Cross multiply
    74,720x = 155,776 × 155,776
  4. Step 4: Simplify right side
    74,720x = 24,266,162,176
  5. Step 5: Solve for x
    x = 24,266,162,176/74,720
  6. Step 6: Final answer
    x = 324,761.27

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.