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Finding the Fourth Proportional to 228,751.39, 315,601.26 and 138,072.91

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Solution

The fourth proportional to 228,751.39, 315,601.26 and 138,072.91 is: 190,494.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,751.39 : 315,601.26 = 138,072.91 : x
  2. Step 2: Convert to fraction form
    228,751.39/315,601.26 = 138,072.91/x
  3. Step 3: Cross multiply
    228,751.39x = 315,601.26 × 138,072.91
  4. Step 4: Simplify right side
    228,751.39x = 43,575,984,367.87
  5. Step 5: Solve for x
    x = 43,575,984,367.87/228,751.39
  6. Step 6: Final answer
    x = 190,494.95

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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.