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Finding the Fourth Proportional to 121,638.26, 167,840.76 and 67,914.64

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Solution

The fourth proportional to 121,638.26, 167,840.76 and 67,914.64 is: 93,711.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,638.26 : 167,840.76 = 67,914.64 : x
  2. Step 2: Convert to fraction form
    121,638.26/167,840.76 = 67,914.64/x
  3. Step 3: Cross multiply
    121,638.26x = 167,840.76 × 67,914.64
  4. Step 4: Simplify right side
    121,638.26x = 11,398,844,792.73
  5. Step 5: Solve for x
    x = 11,398,844,792.73/121,638.26
  6. Step 6: Final answer
    x = 93,711.01

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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.