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Finding the Fourth Proportional to 191,812.20, 287,718.30 and 98,500.20

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Solution

The fourth proportional to 191,812.20, 287,718.30 and 98,500.20 is: 147,750.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,812.20 : 287,718.30 = 98,500.20 : x
  2. Step 2: Convert to fraction form
    191,812.20/287,718.30 = 98,500.20/x
  3. Step 3: Cross multiply
    191,812.20x = 287,718.30 × 98,500.20
  4. Step 4: Simplify right side
    191,812.20x = 28,340,310,093.66
  5. Step 5: Solve for x
    x = 28,340,310,093.66/191,812.20
  6. Step 6: Final answer
    x = 147,750.30

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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.