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Finding the Fourth Proportional to 72,568.47, 108,859.58 and 28,198.65

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Solution

The fourth proportional to 72,568.47, 108,859.58 and 28,198.65 is: 42,300.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,568.47 : 108,859.58 = 28,198.65 : x
  2. Step 2: Convert to fraction form
    72,568.47/108,859.58 = 28,198.65/x
  3. Step 3: Cross multiply
    72,568.47x = 108,859.58 × 28,198.65
  4. Step 4: Simplify right side
    72,568.47x = 3,069,693,195.57
  5. Step 5: Solve for x
    x = 3,069,693,195.57/72,568.47
  6. Step 6: Final answer
    x = 42,300.65

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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.