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Finding the Fourth Proportional to 121,129.58, 167,157.16 and 67,414.59

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Solution

The fourth proportional to 121,129.58, 167,157.16 and 67,414.59 is: 93,031.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,129.58 : 167,157.16 = 67,414.59 : x
  2. Step 2: Convert to fraction form
    121,129.58/167,157.16 = 67,414.59/x
  3. Step 3: Cross multiply
    121,129.58x = 167,157.16 × 67,414.59
  4. Step 4: Simplify right side
    121,129.58x = 11,268,831,238.43
  5. Step 5: Solve for x
    x = 11,268,831,238.43/121,129.58
  6. Step 6: Final answer
    x = 93,031.21

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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.