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Finding the Fourth Proportional to 272,255.90, 408,055.80 and 139,067.60

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Solution

The fourth proportional to 272,255.90, 408,055.80 and 139,067.60 is: 208,433.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,255.90 : 408,055.80 = 139,067.60 : x
  2. Step 2: Convert to fraction form
    272,255.90/408,055.80 = 139,067.60/x
  3. Step 3: Cross multiply
    272,255.90x = 408,055.80 × 139,067.60
  4. Step 4: Simplify right side
    272,255.90x = 56,747,340,772.08
  5. Step 5: Solve for x
    x = 56,747,340,772.08/272,255.90
  6. Step 6: Final answer
    x = 208,433.83

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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.