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Finding the Fourth Proportional to 272,045.20, 408,067.80 and 105,725.20

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Solution

The fourth proportional to 272,045.20, 408,067.80 and 105,725.20 is: 158,587.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,045.20 : 408,067.80 = 105,725.20 : x
  2. Step 2: Convert to fraction form
    272,045.20/408,067.80 = 105,725.20/x
  3. Step 3: Cross multiply
    272,045.20x = 408,067.80 × 105,725.20
  4. Step 4: Simplify right side
    272,045.20x = 43,143,049,768.56
  5. Step 5: Solve for x
    x = 43,143,049,768.56/272,045.20
  6. Step 6: Final answer
    x = 158,587.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.