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Finding the Fourth Proportional to 62,640.21, 86,384.79 and 49,935.54

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Solution

The fourth proportional to 62,640.21, 86,384.79 and 49,935.54 is: 68,864.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,640.21 : 86,384.79 = 49,935.54 : x
  2. Step 2: Convert to fraction form
    62,640.21/86,384.79 = 49,935.54/x
  3. Step 3: Cross multiply
    62,640.21x = 86,384.79 × 49,935.54
  4. Step 4: Simplify right side
    62,640.21x = 4,313,671,136.44
  5. Step 5: Solve for x
    x = 4,313,671,136.44/62,640.21
  6. Step 6: Final answer
    x = 68,864.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.