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Finding the Fourth Proportional to 208,664.66, 312,993.50 and 66,507.99

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Solution

The fourth proportional to 208,664.66, 312,993.50 and 66,507.99 is: 99,760.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,664.66 : 312,993.50 = 66,507.99 : x
  2. Step 2: Convert to fraction form
    208,664.66/312,993.50 = 66,507.99/x
  3. Step 3: Cross multiply
    208,664.66x = 312,993.50 × 66,507.99
  4. Step 4: Simplify right side
    208,664.66x = 20,816,568,235.53
  5. Step 5: Solve for x
    x = 20,816,568,235.53/208,664.66
  6. Step 6: Final answer
    x = 99,760.87

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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.