Home / 129,268.53-178,369.97-78,272.55

Finding the Fourth Proportional to 129,268.53, 178,369.97 and 78,272.55

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Solution

The fourth proportional to 129,268.53, 178,369.97 and 78,272.55 is: 108,003.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,268.53 : 178,369.97 = 78,272.55 : x
  2. Step 2: Convert to fraction form
    129,268.53/178,369.97 = 78,272.55/x
  3. Step 3: Cross multiply
    129,268.53x = 178,369.97 × 78,272.55
  4. Step 4: Simplify right side
    129,268.53x = 13,961,472,003.96
  5. Step 5: Solve for x
    x = 13,961,472,003.96/129,268.53
  6. Step 6: Final answer
    x = 108,003.64

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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.