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Finding the Fourth Proportional to 191,711.70, 287,895.60 and 185,806.80

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Solution

The fourth proportional to 191,711.70, 287,895.60 and 185,806.80 is: 279,028.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,711.70 : 287,895.60 = 185,806.80 : x
  2. Step 2: Convert to fraction form
    191,711.70/287,895.60 = 185,806.80/x
  3. Step 3: Cross multiply
    191,711.70x = 287,895.60 × 185,806.80
  4. Step 4: Simplify right side
    191,711.70x = 53,492,960,170.08
  5. Step 5: Solve for x
    x = 53,492,960,170.08/191,711.70
  6. Step 6: Final answer
    x = 279,028.15

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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.