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Finding the Fourth Proportional to 65,491.87, 98,155.60 and 28,007.85

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Solution

The fourth proportional to 65,491.87, 98,155.60 and 28,007.85 is: 41,976.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,491.87 : 98,155.60 = 28,007.85 : x
  2. Step 2: Convert to fraction form
    65,491.87/98,155.60 = 28,007.85/x
  3. Step 3: Cross multiply
    65,491.87x = 98,155.60 × 28,007.85
  4. Step 4: Simplify right side
    65,491.87x = 2,749,127,321.46
  5. Step 5: Solve for x
    x = 2,749,127,321.46/65,491.87
  6. Step 6: Final answer
    x = 41,976.62

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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.