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Finding the Fourth Proportional to 159,377.12, 219,936.12 and 91,405.52

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Solution

The fourth proportional to 159,377.12, 219,936.12 and 91,405.52 is: 126,137.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,377.12 : 219,936.12 = 91,405.52 : x
  2. Step 2: Convert to fraction form
    159,377.12/219,936.12 = 91,405.52/x
  3. Step 3: Cross multiply
    159,377.12x = 219,936.12 × 91,405.52
  4. Step 4: Simplify right side
    159,377.12x = 20,103,375,415.38
  5. Step 5: Solve for x
    x = 20,103,375,415.38/159,377.12
  6. Step 6: Final answer
    x = 126,137.15

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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.