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Finding the Fourth Proportional to 145,240.79, 200,451.11 and 81,578.60

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Solution

The fourth proportional to 145,240.79, 200,451.11 and 81,578.60 is: 112,589.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,240.79 : 200,451.11 = 81,578.60 : x
  2. Step 2: Convert to fraction form
    145,240.79/200,451.11 = 81,578.60/x
  3. Step 3: Cross multiply
    145,240.79x = 200,451.11 × 81,578.60
  4. Step 4: Simplify right side
    145,240.79x = 16,352,520,922.25
  5. Step 5: Solve for x
    x = 16,352,520,922.25/145,240.79
  6. Step 6: Final answer
    x = 112,589.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.