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Finding the Third Proportional to 79,920 and 119,178

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Solution

The third proportional to 79,920 and 119,178 is: 177,720.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,920 : 119,178 = 119,178 : x
  2. Step 2: Convert to fraction form
    79,920/119,178 = 119,178/x
  3. Step 3: Cross multiply
    79,920x = 119,178 × 119,178
  4. Step 4: Simplify right side
    79,920x = 14,203,395,684
  5. Step 5: Solve for x
    x = 14,203,395,684/79,920
  6. Step 6: Final answer
    x = 177,720.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.