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Finding the Fourth Proportional to 48,395.76, 72,621.86 and 20,313.65

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Solution

The fourth proportional to 48,395.76, 72,621.86 and 20,313.65 is: 30,482.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,395.76 : 72,621.86 = 20,313.65 : x
  2. Step 2: Convert to fraction form
    48,395.76/72,621.86 = 20,313.65/x
  3. Step 3: Cross multiply
    48,395.76x = 72,621.86 × 20,313.65
  4. Step 4: Simplify right side
    48,395.76x = 1,475,214,581.71
  5. Step 5: Solve for x
    x = 1,475,214,581.71/48,395.76
  6. Step 6: Final answer
    x = 30,482.31

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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.