Home / 129,425.54-178,611.96-72,067.82

Finding the Fourth Proportional to 129,425.54, 178,611.96 and 72,067.82

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Solution

The fourth proportional to 129,425.54, 178,611.96 and 72,067.82 is: 99,456.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,425.54 : 178,611.96 = 72,067.82 : x
  2. Step 2: Convert to fraction form
    129,425.54/178,611.96 = 72,067.82/x
  3. Step 3: Cross multiply
    129,425.54x = 178,611.96 × 72,067.82
  4. Step 4: Simplify right side
    129,425.54x = 12,872,173,690.07
  5. Step 5: Solve for x
    x = 12,872,173,690.07/129,425.54
  6. Step 6: Final answer
    x = 99,456.21

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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.