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Finding the Fourth Proportional to 74,388.87, 111,583.31 and 21,798.36

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Solution

The fourth proportional to 74,388.87, 111,583.31 and 21,798.36 is: 32,697.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,388.87 : 111,583.31 = 21,798.36 : x
  2. Step 2: Convert to fraction form
    74,388.87/111,583.31 = 21,798.36/x
  3. Step 3: Cross multiply
    74,388.87x = 111,583.31 × 21,798.36
  4. Step 4: Simplify right side
    74,388.87x = 2,432,333,052.38
  5. Step 5: Solve for x
    x = 2,432,333,052.38/74,388.87
  6. Step 6: Final answer
    x = 32,697.54

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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.