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Finding the Third Proportional to 55,028 and 128,578

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Solution

The third proportional to 55,028 and 128,578 is: 300,434.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,028 : 128,578 = 128,578 : x
  2. Step 2: Convert to fraction form
    55,028/128,578 = 128,578/x
  3. Step 3: Cross multiply
    55,028x = 128,578 × 128,578
  4. Step 4: Simplify right side
    55,028x = 16,532,302,084
  5. Step 5: Solve for x
    x = 16,532,302,084/55,028
  6. Step 6: Final answer
    x = 300,434.36

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Why These Related Problems?

These problems maintain the same ratio (2.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.