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Finding the Third Proportional to 57,418 and 121,786

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Solution

The third proportional to 57,418 and 121,786 is: 258,313.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,418 : 121,786 = 121,786 : x
  2. Step 2: Convert to fraction form
    57,418/121,786 = 121,786/x
  3. Step 3: Cross multiply
    57,418x = 121,786 × 121,786
  4. Step 4: Simplify right side
    57,418x = 14,831,829,796
  5. Step 5: Solve for x
    x = 14,831,829,796/57,418
  6. Step 6: Final answer
    x = 258,313.24

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.