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Finding the Third Proportional to 77,776 and 120,656

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Solution

The third proportional to 77,776 and 120,656 is: 187,176.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,776 : 120,656 = 120,656 : x
  2. Step 2: Convert to fraction form
    77,776/120,656 = 120,656/x
  3. Step 3: Cross multiply
    77,776x = 120,656 × 120,656
  4. Step 4: Simplify right side
    77,776x = 14,557,870,336
  5. Step 5: Solve for x
    x = 14,557,870,336/77,776
  6. Step 6: Final answer
    x = 187,176.90

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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.