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Finding the Fourth Proportional to 73,213.97, 109,779.34 and 28,816.65

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Solution

The fourth proportional to 73,213.97, 109,779.34 and 28,816.65 is: 43,208.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,213.97 : 109,779.34 = 28,816.65 : x
  2. Step 2: Convert to fraction form
    73,213.97/109,779.34 = 28,816.65/x
  3. Step 3: Cross multiply
    73,213.97x = 109,779.34 × 28,816.65
  4. Step 4: Simplify right side
    73,213.97x = 3,163,473,020.42
  5. Step 5: Solve for x
    x = 3,163,473,020.42/73,213.97
  6. Step 6: Final answer
    x = 43,208.60

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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.