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Finding the Fourth Proportional to 74,070, 111,105 and 18,666

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Solution

The fourth proportional to 74,070, 111,105 and 18,666 is: 27,999

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,070 : 111,105 = 18,666 : x
  2. Step 2: Convert to fraction form
    74,070/111,105 = 18,666/x
  3. Step 3: Cross multiply
    74,070x = 111,105 × 18,666
  4. Step 4: Simplify right side
    74,070x = 2,073,885,930
  5. Step 5: Solve for x
    x = 2,073,885,930/74,070
  6. Step 6: Final answer
    x = 27,999

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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.