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Finding the Fourth Proportional to 98,470.64, 147,751.32 and 61,074.56

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Solution

The fourth proportional to 98,470.64, 147,751.32 and 61,074.56 is: 91,639.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,470.64 : 147,751.32 = 61,074.56 : x
  2. Step 2: Convert to fraction form
    98,470.64/147,751.32 = 61,074.56/x
  3. Step 3: Cross multiply
    98,470.64x = 147,751.32 × 61,074.56
  4. Step 4: Simplify right side
    98,470.64x = 9,023,846,858.42
  5. Step 5: Solve for x
    x = 9,023,846,858.42/98,470.64
  6. Step 6: Final answer
    x = 91,639.97

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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.