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Finding the Third Proportional to 78,042 and 120,786

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Solution

The third proportional to 78,042 and 120,786 is: 186,941.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,042 : 120,786 = 120,786 : x
  2. Step 2: Convert to fraction form
    78,042/120,786 = 120,786/x
  3. Step 3: Cross multiply
    78,042x = 120,786 × 120,786
  4. Step 4: Simplify right side
    78,042x = 14,589,257,796
  5. Step 5: Solve for x
    x = 14,589,257,796/78,042
  6. Step 6: Final answer
    x = 186,941.11

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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.