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Finding the Fourth Proportional to 208,721.57, 313,127.72 and 68,474.93

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Solution

The fourth proportional to 208,721.57, 313,127.72 and 68,474.93 is: 102,727.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,721.57 : 313,127.72 = 68,474.93 : x
  2. Step 2: Convert to fraction form
    208,721.57/313,127.72 = 68,474.93/x
  3. Step 3: Cross multiply
    208,721.57x = 313,127.72 × 68,474.93
  4. Step 4: Simplify right side
    208,721.57x = 21,441,398,365.68
  5. Step 5: Solve for x
    x = 21,441,398,365.68/208,721.57
  6. Step 6: Final answer
    x = 102,727.28

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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.