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Finding the Fourth Proportional to 124,661, 172,033.09 and 68,072.38

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Solution

The fourth proportional to 124,661, 172,033.09 and 68,072.38 is: 93,940.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,661 : 172,033.09 = 68,072.38 : x
  2. Step 2: Convert to fraction form
    124,661/172,033.09 = 68,072.38/x
  3. Step 3: Cross multiply
    124,661x = 172,033.09 × 68,072.38
  4. Step 4: Simplify right side
    124,661x = 11,710,701,875.05
  5. Step 5: Solve for x
    x = 11,710,701,875.05/124,661
  6. Step 6: Final answer
    x = 93,940.38

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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.