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Finding the Fourth Proportional to 81,666, 122,499 and 26,262

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Solution

The fourth proportional to 81,666, 122,499 and 26,262 is: 39,393

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,666 : 122,499 = 26,262 : x
  2. Step 2: Convert to fraction form
    81,666/122,499 = 26,262/x
  3. Step 3: Cross multiply
    81,666x = 122,499 × 26,262
  4. Step 4: Simplify right side
    81,666x = 3,217,068,738
  5. Step 5: Solve for x
    x = 3,217,068,738/81,666
  6. Step 6: Final answer
    x = 39,393

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.