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Finding the Fourth Proportional to 228,791.25, 315,731.93 and 139,367.25

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Solution

The fourth proportional to 228,791.25, 315,731.93 and 139,367.25 is: 192,326.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,791.25 : 315,731.93 = 139,367.25 : x
  2. Step 2: Convert to fraction form
    228,791.25/315,731.93 = 139,367.25/x
  3. Step 3: Cross multiply
    228,791.25x = 315,731.93 × 139,367.25
  4. Step 4: Simplify right side
    228,791.25x = 44,002,690,124.46
  5. Step 5: Solve for x
    x = 44,002,690,124.46/228,791.25
  6. Step 6: Final answer
    x = 192,326.81

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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.