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Finding the Fourth Proportional to 191,939.88, 287,910.30 and 98,394.60

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Solution

The fourth proportional to 191,939.88, 287,910.30 and 98,394.60 is: 147,592.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,939.88 : 287,910.30 = 98,394.60 : x
  2. Step 2: Convert to fraction form
    191,939.88/287,910.30 = 98,394.60/x
  3. Step 3: Cross multiply
    191,939.88x = 287,910.30 × 98,394.60
  4. Step 4: Simplify right side
    191,939.88x = 28,328,818,804.38
  5. Step 5: Solve for x
    x = 28,328,818,804.38/191,939.88
  6. Step 6: Final answer
    x = 147,592.15

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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.