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Finding the Third Proportional to 56,521 and 121,789

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Solution

The third proportional to 56,521 and 121,789 is: 262,425.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,521 : 121,789 = 121,789 : x
  2. Step 2: Convert to fraction form
    56,521/121,789 = 121,789/x
  3. Step 3: Cross multiply
    56,521x = 121,789 × 121,789
  4. Step 4: Simplify right side
    56,521x = 14,832,560,521
  5. Step 5: Solve for x
    x = 14,832,560,521/56,521
  6. Step 6: Final answer
    x = 262,425.66

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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.