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Finding the Fourth Proportional to 73,687.80, 110,646.90 and 42,583.80

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Solution

The fourth proportional to 73,687.80, 110,646.90 and 42,583.80 is: 63,942.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,687.80 : 110,646.90 = 42,583.80 : x
  2. Step 2: Convert to fraction form
    73,687.80/110,646.90 = 42,583.80/x
  3. Step 3: Cross multiply
    73,687.80x = 110,646.90 × 42,583.80
  4. Step 4: Simplify right side
    73,687.80x = 4,711,765,460.22
  5. Step 5: Solve for x
    x = 4,711,765,460.22/73,687.80
  6. Step 6: Final answer
    x = 63,942.27

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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.