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Finding the Fourth Proportional to 74,304, 111,462.48 and 18,900

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Solution

The fourth proportional to 74,304, 111,462.48 and 18,900 is: 28,351.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,304 : 111,462.48 = 18,900 : x
  2. Step 2: Convert to fraction form
    74,304/111,462.48 = 18,900/x
  3. Step 3: Cross multiply
    74,304x = 111,462.48 × 18,900
  4. Step 4: Simplify right side
    74,304x = 2,106,640,872
  5. Step 5: Solve for x
    x = 2,106,640,872/74,304
  6. Step 6: Final answer
    x = 28,351.65

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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.