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Finding the Fourth Proportional to 124,380, 171,644.40 and 67,791.51

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Solution

The fourth proportional to 124,380, 171,644.40 and 67,791.51 is: 93,552.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,380 : 171,644.40 = 67,791.51 : x
  2. Step 2: Convert to fraction form
    124,380/171,644.40 = 67,791.51/x
  3. Step 3: Cross multiply
    124,380x = 171,644.40 × 67,791.51
  4. Step 4: Simplify right side
    124,380x = 11,636,033,059.04
  5. Step 5: Solve for x
    x = 11,636,033,059.04/124,380
  6. Step 6: Final answer
    x = 93,552.28

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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.