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Finding the Fourth Proportional to 191,585.92, 287,309.72 and 80,786.56

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Solution

The fourth proportional to 191,585.92, 287,309.72 and 80,786.56 is: 121,150.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,585.92 : 287,309.72 = 80,786.56 : x
  2. Step 2: Convert to fraction form
    191,585.92/287,309.72 = 80,786.56/x
  3. Step 3: Cross multiply
    191,585.92x = 287,309.72 × 80,786.56
  4. Step 4: Simplify right side
    191,585.92x = 23,210,763,933.36
  5. Step 5: Solve for x
    x = 23,210,763,933.36/191,585.92
  6. Step 6: Final answer
    x = 121,150.68

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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.