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Finding the Fourth Proportional to 200,634.37, 300,990.87 and 74,275.65

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Solution

The fourth proportional to 200,634.37, 300,990.87 and 74,275.65 is: 111,428.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,634.37 : 300,990.87 = 74,275.65 : x
  2. Step 2: Convert to fraction form
    200,634.37/300,990.87 = 74,275.65/x
  3. Step 3: Cross multiply
    200,634.37x = 300,990.87 × 74,275.65
  4. Step 4: Simplify right side
    200,634.37x = 22,356,292,513.32
  5. Step 5: Solve for x
    x = 22,356,292,513.32/200,634.37
  6. Step 6: Final answer
    x = 111,428.03

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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.