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Finding the Fourth Proportional to 191,811.20, 287,716.80 and 98,499.20

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Solution

The fourth proportional to 191,811.20, 287,716.80 and 98,499.20 is: 147,748.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,811.20 : 287,716.80 = 98,499.20 : x
  2. Step 2: Convert to fraction form
    191,811.20/287,716.80 = 98,499.20/x
  3. Step 3: Cross multiply
    191,811.20x = 287,716.80 × 98,499.20
  4. Step 4: Simplify right side
    191,811.20x = 28,339,874,626.56
  5. Step 5: Solve for x
    x = 28,339,874,626.56/191,811.20
  6. Step 6: Final answer
    x = 147,748.80

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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.