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Finding the Fourth Proportional to 191,747.20, 287,620.80 and 98,435.20

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Solution

The fourth proportional to 191,747.20, 287,620.80 and 98,435.20 is: 147,652.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,747.20 : 287,620.80 = 98,435.20 : x
  2. Step 2: Convert to fraction form
    191,747.20/287,620.80 = 98,435.20/x
  3. Step 3: Cross multiply
    191,747.20x = 287,620.80 × 98,435.20
  4. Step 4: Simplify right side
    191,747.20x = 28,312,010,972.16
  5. Step 5: Solve for x
    x = 28,312,010,972.16/191,747.20
  6. Step 6: Final answer
    x = 147,652.80

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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.