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Finding the Fourth Proportional to 73,876.20, 110,742.30 and 42,253.80

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Solution

The fourth proportional to 73,876.20, 110,742.30 and 42,253.80 is: 63,339.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,876.20 : 110,742.30 = 42,253.80 : x
  2. Step 2: Convert to fraction form
    73,876.20/110,742.30 = 42,253.80/x
  3. Step 3: Cross multiply
    73,876.20x = 110,742.30 × 42,253.80
  4. Step 4: Simplify right side
    73,876.20x = 4,679,282,995.74
  5. Step 5: Solve for x
    x = 4,679,282,995.74/73,876.20
  6. Step 6: Final answer
    x = 63,339.52

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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.