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Finding the Fourth Proportional to 124,698, 172,084.17 and 68,109.38

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Solution

The fourth proportional to 124,698, 172,084.17 and 68,109.38 is: 93,991.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,698 : 172,084.17 = 68,109.38 : x
  2. Step 2: Convert to fraction form
    124,698/172,084.17 = 68,109.38/x
  3. Step 3: Cross multiply
    124,698x = 172,084.17 × 68,109.38
  4. Step 4: Simplify right side
    124,698x = 11,720,545,266.09
  5. Step 5: Solve for x
    x = 11,720,545,266.09/124,698
  6. Step 6: Final answer
    x = 93,991.45

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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.