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Finding the Fourth Proportional to 73,890, 110,835 and 18,486

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Solution

The fourth proportional to 73,890, 110,835 and 18,486 is: 27,729

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,890 : 110,835 = 18,486 : x
  2. Step 2: Convert to fraction form
    73,890/110,835 = 18,486/x
  3. Step 3: Cross multiply
    73,890x = 110,835 × 18,486
  4. Step 4: Simplify right side
    73,890x = 2,048,895,810
  5. Step 5: Solve for x
    x = 2,048,895,810/73,890
  6. Step 6: Final answer
    x = 27,729

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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.