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Finding the Fourth Proportional to 191,782.80, 287,674.20 and 67,136.40

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Solution

The fourth proportional to 191,782.80, 287,674.20 and 67,136.40 is: 100,704.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,782.80 : 287,674.20 = 67,136.40 : x
  2. Step 2: Convert to fraction form
    191,782.80/287,674.20 = 67,136.40/x
  3. Step 3: Cross multiply
    191,782.80x = 287,674.20 × 67,136.40
  4. Step 4: Simplify right side
    191,782.80x = 19,313,410,160.88
  5. Step 5: Solve for x
    x = 19,313,410,160.88/191,782.80
  6. Step 6: Final answer
    x = 100,704.60

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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.