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Finding the Fourth Proportional to 191,445.11, 287,264.54 and 79,205.88

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Solution

The fourth proportional to 191,445.11, 287,264.54 and 79,205.88 is: 118,848.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,445.11 : 287,264.54 = 79,205.88 : x
  2. Step 2: Convert to fraction form
    191,445.11/287,264.54 = 79,205.88/x
  3. Step 3: Cross multiply
    191,445.11x = 287,264.54 × 79,205.88
  4. Step 4: Simplify right side
    191,445.11x = 22,753,040,485.65
  5. Step 5: Solve for x
    x = 22,753,040,485.65/191,445.11
  6. Step 6: Final answer
    x = 118,848.90

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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.