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Finding the Fourth Proportional to 217,891.60, 326,837.40 and 77,599.60

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Solution

The fourth proportional to 217,891.60, 326,837.40 and 77,599.60 is: 116,399.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,891.60 : 326,837.40 = 77,599.60 : x
  2. Step 2: Convert to fraction form
    217,891.60/326,837.40 = 77,599.60/x
  3. Step 3: Cross multiply
    217,891.60x = 326,837.40 × 77,599.60
  4. Step 4: Simplify right side
    217,891.60x = 25,362,451,505.04
  5. Step 5: Solve for x
    x = 25,362,451,505.04/217,891.60
  6. Step 6: Final answer
    x = 116,399.40

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1.5x scale

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.