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Finding the Fourth Proportional to 122,171.76, 168,592.95 and 67,721.64

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Solution

The fourth proportional to 122,171.76, 168,592.95 and 67,721.64 is: 93,453.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,171.76 : 168,592.95 = 67,721.64 : x
  2. Step 2: Convert to fraction form
    122,171.76/168,592.95 = 67,721.64/x
  3. Step 3: Cross multiply
    122,171.76x = 168,592.95 × 67,721.64
  4. Step 4: Simplify right side
    122,171.76x = 11,417,391,066.44
  5. Step 5: Solve for x
    x = 11,417,391,066.44/122,171.76
  6. Step 6: Final answer
    x = 93,453.60

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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.