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Finding the Fourth Proportional to 200,619.81, 300,717.60 and 74,178.86

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Solution

The fourth proportional to 200,619.81, 300,717.60 and 74,178.86 is: 111,189.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,619.81 : 300,717.60 = 74,178.86 : x
  2. Step 2: Convert to fraction form
    200,619.81/300,717.60 = 74,178.86/x
  3. Step 3: Cross multiply
    200,619.81x = 300,717.60 × 74,178.86
  4. Step 4: Simplify right side
    200,619.81x = 22,306,887,246.35
  5. Step 5: Solve for x
    x = 22,306,887,246.35/200,619.81
  6. Step 6: Final answer
    x = 111,189.85

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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.