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Finding the Fourth Proportional to 200,619.61, 300,968.78 and 74,260.96

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Solution

The fourth proportional to 200,619.61, 300,968.78 and 74,260.96 is: 111,406.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,619.61 : 300,968.78 = 74,260.96 : x
  2. Step 2: Convert to fraction form
    200,619.61/300,968.78 = 74,260.96/x
  3. Step 3: Cross multiply
    200,619.61x = 300,968.78 × 74,260.96
  4. Step 4: Simplify right side
    200,619.61x = 22,350,230,532.83
  5. Step 5: Solve for x
    x = 22,350,230,532.83/200,619.61
  6. Step 6: Final answer
    x = 111,406.01

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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.