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Finding the Fourth Proportional to 122,356.78, 168,851.95 and 67,917.17

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Solution

The fourth proportional to 122,356.78, 168,851.95 and 67,917.17 is: 93,725.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,356.78 : 168,851.95 = 67,917.17 : x
  2. Step 2: Convert to fraction form
    122,356.78/168,851.95 = 67,917.17/x
  3. Step 3: Cross multiply
    122,356.78x = 168,851.95 × 67,917.17
  4. Step 4: Simplify right side
    122,356.78x = 11,467,946,845.32
  5. Step 5: Solve for x
    x = 11,467,946,845.32/122,356.78
  6. Step 6: Final answer
    x = 93,725.47

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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.