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Finding the Fourth Proportional to 252,039.90, 378,133.66 and 74,551.64

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Solution

The fourth proportional to 252,039.90, 378,133.66 and 74,551.64 is: 111,849.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,039.90 : 378,133.66 = 74,551.64 : x
  2. Step 2: Convert to fraction form
    252,039.90/378,133.66 = 74,551.64/x
  3. Step 3: Cross multiply
    252,039.90x = 378,133.66 × 74,551.64
  4. Step 4: Simplify right side
    252,039.90x = 28,190,482,485.05
  5. Step 5: Solve for x
    x = 28,190,482,485.05/252,039.90
  6. Step 6: Final answer
    x = 111,849.29

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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.