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Finding the Fourth Proportional to 191,491.20, 287,121.60 and 98,179.20

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Solution

The fourth proportional to 191,491.20, 287,121.60 and 98,179.20 is: 147,209.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,491.20 : 287,121.60 = 98,179.20 : x
  2. Step 2: Convert to fraction form
    191,491.20/287,121.60 = 98,179.20/x
  3. Step 3: Cross multiply
    191,491.20x = 287,121.60 × 98,179.20
  4. Step 4: Simplify right side
    191,491.20x = 28,189,368,990.72
  5. Step 5: Solve for x
    x = 28,189,368,990.72/191,491.20
  6. Step 6: Final answer
    x = 147,209.74

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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.