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Finding the Fourth Proportional to 191,806.20, 287,795.70 and 91,927.80

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Solution

The fourth proportional to 191,806.20, 287,795.70 and 91,927.80 is: 137,933.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,806.20 : 287,795.70 = 91,927.80 : x
  2. Step 2: Convert to fraction form
    191,806.20/287,795.70 = 91,927.80/x
  3. Step 3: Cross multiply
    191,806.20x = 287,795.70 × 91,927.80
  4. Step 4: Simplify right side
    191,806.20x = 26,456,425,550.46
  5. Step 5: Solve for x
    x = 26,456,425,550.46/191,806.20
  6. Step 6: Final answer
    x = 137,933.11

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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.