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Finding the Fourth Proportional to 73,205.70, 109,808.55 and 60,739.80

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Solution

The fourth proportional to 73,205.70, 109,808.55 and 60,739.80 is: 91,109.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,205.70 : 109,808.55 = 60,739.80 : x
  2. Step 2: Convert to fraction form
    73,205.70/109,808.55 = 60,739.80/x
  3. Step 3: Cross multiply
    73,205.70x = 109,808.55 × 60,739.80
  4. Step 4: Simplify right side
    73,205.70x = 6,669,749,365.29
  5. Step 5: Solve for x
    x = 6,669,749,365.29/73,205.70
  6. Step 6: Final answer
    x = 91,109.70

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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.