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Finding the Fourth Proportional to 75,907.80, 113,861.70 and 53,746.20

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Solution

The fourth proportional to 75,907.80, 113,861.70 and 53,746.20 is: 80,619.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,907.80 : 113,861.70 = 53,746.20 : x
  2. Step 2: Convert to fraction form
    75,907.80/113,861.70 = 53,746.20/x
  3. Step 3: Cross multiply
    75,907.80x = 113,861.70 × 53,746.20
  4. Step 4: Simplify right side
    75,907.80x = 6,119,633,700.54
  5. Step 5: Solve for x
    x = 6,119,633,700.54/75,907.80
  6. Step 6: Final answer
    x = 80,619.30

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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.