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Finding the Fourth Proportional to 208,600.69, 312,930.87 and 64,517.62

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Solution

The fourth proportional to 208,600.69, 312,930.87 and 64,517.62 is: 96,785.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,600.69 : 312,930.87 = 64,517.62 : x
  2. Step 2: Convert to fraction form
    208,600.69/312,930.87 = 64,517.62/x
  3. Step 3: Cross multiply
    208,600.69x = 312,930.87 × 64,517.62
  4. Step 4: Simplify right side
    208,600.69x = 20,189,554,956.93
  5. Step 5: Solve for x
    x = 20,189,554,956.93/208,600.69
  6. Step 6: Final answer
    x = 96,785.66

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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.