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Finding the Fourth Proportional to 191,591.80, 286,998.90 and 108,388.60

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Solution

The fourth proportional to 191,591.80, 286,998.90 and 108,388.60 is: 162,362.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,591.80 : 286,998.90 = 108,388.60 : x
  2. Step 2: Convert to fraction form
    191,591.80/286,998.90 = 108,388.60/x
  3. Step 3: Cross multiply
    191,591.80x = 286,998.90 × 108,388.60
  4. Step 4: Simplify right side
    191,591.80x = 31,107,408,972.54
  5. Step 5: Solve for x
    x = 31,107,408,972.54/191,591.80
  6. Step 6: Final answer
    x = 162,362.95

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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.