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Finding the Third Proportional to 55,540 and 79,155

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Solution

The third proportional to 55,540 and 79,155 is: 112,810.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,540 : 79,155 = 79,155 : x
  2. Step 2: Convert to fraction form
    55,540/79,155 = 79,155/x
  3. Step 3: Cross multiply
    55,540x = 79,155 × 79,155
  4. Step 4: Simplify right side
    55,540x = 6,265,514,025
  5. Step 5: Solve for x
    x = 6,265,514,025/55,540
  6. Step 6: Final answer
    x = 112,810.84

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.