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Finding the Fourth Proportional to 199,520.64, 299,329.76 and 66,400.64

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Solution

The fourth proportional to 199,520.64, 299,329.76 and 66,400.64 is: 99,617.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,520.64 : 299,329.76 = 66,400.64 : x
  2. Step 2: Convert to fraction form
    199,520.64/299,329.76 = 66,400.64/x
  3. Step 3: Cross multiply
    199,520.64x = 299,329.76 × 66,400.64
  4. Step 4: Simplify right side
    199,520.64x = 19,875,687,635.05
  5. Step 5: Solve for x
    x = 19,875,687,635.05/199,520.64
  6. Step 6: Final answer
    x = 99,617.20

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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.