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Finding the Fourth Proportional to 200,620.28, 300,969.77 and 74,261.60

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Solution

The fourth proportional to 200,620.28, 300,969.77 and 74,261.60 is: 111,406.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,620.28 : 300,969.77 = 74,261.60 : x
  2. Step 2: Convert to fraction form
    200,620.28/300,969.77 = 74,261.60/x
  3. Step 3: Cross multiply
    200,620.28x = 300,969.77 × 74,261.60
  4. Step 4: Simplify right side
    200,620.28x = 22,350,495,924.31
  5. Step 5: Solve for x
    x = 22,350,495,924.31/200,620.28
  6. Step 6: Final answer
    x = 111,406.96

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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.