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Finding the Fourth Proportional to 121,807.31, 168,092.91 and 67,361.85

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Solution

The fourth proportional to 121,807.31, 168,092.91 and 67,361.85 is: 92,958.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,807.31 : 168,092.91 = 67,361.85 : x
  2. Step 2: Convert to fraction form
    121,807.31/168,092.91 = 67,361.85/x
  3. Step 3: Cross multiply
    121,807.31x = 168,092.91 × 67,361.85
  4. Step 4: Simplify right side
    121,807.31x = 11,323,049,389.48
  5. Step 5: Solve for x
    x = 11,323,049,389.48/121,807.31
  6. Step 6: Final answer
    x = 92,958.71

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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.