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Finding the Fourth Proportional to 191,879.66, 287,819.50 and 67,191.50

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Solution

The fourth proportional to 191,879.66, 287,819.50 and 67,191.50 is: 100,787.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,879.66 : 287,819.50 = 67,191.50 : x
  2. Step 2: Convert to fraction form
    191,879.66/287,819.50 = 67,191.50/x
  3. Step 3: Cross multiply
    191,879.66x = 287,819.50 × 67,191.50
  4. Step 4: Simplify right side
    191,879.66x = 19,339,023,934.25
  5. Step 5: Solve for x
    x = 19,339,023,934.25/191,879.66
  6. Step 6: Final answer
    x = 100,787.25

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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.