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Finding the Fourth Proportional to 74,722.30, 111,752.97 and 66,460.30

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Solution

The fourth proportional to 74,722.30, 111,752.97 and 66,460.30 is: 99,396.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,722.30 : 111,752.97 = 66,460.30 : x
  2. Step 2: Convert to fraction form
    74,722.30/111,752.97 = 66,460.30/x
  3. Step 3: Cross multiply
    74,722.30x = 111,752.97 × 66,460.30
  4. Step 4: Simplify right side
    74,722.30x = 7,427,135,912.09
  5. Step 5: Solve for x
    x = 7,427,135,912.09/74,722.30
  6. Step 6: Final answer
    x = 99,396.51

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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.