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Finding the Third Proportional to 55,560 and 77,778

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Solution

The third proportional to 55,560 and 77,778 is: 108,880.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,560 : 77,778 = 77,778 : x
  2. Step 2: Convert to fraction form
    55,560/77,778 = 77,778/x
  3. Step 3: Cross multiply
    55,560x = 77,778 × 77,778
  4. Step 4: Simplify right side
    55,560x = 6,049,417,284
  5. Step 5: Solve for x
    x = 6,049,417,284/55,560
  6. Step 6: Final answer
    x = 108,880.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.