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Finding the Third Proportional to 56,578 and 121,900

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Solution

The third proportional to 56,578 and 121,900 is: 262,639.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,578 : 121,900 = 121,900 : x
  2. Step 2: Convert to fraction form
    56,578/121,900 = 121,900/x
  3. Step 3: Cross multiply
    56,578x = 121,900 × 121,900
  4. Step 4: Simplify right side
    56,578x = 14,859,610,000
  5. Step 5: Solve for x
    x = 14,859,610,000/56,578
  6. Step 6: Final answer
    x = 262,639.37

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.