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Finding the Fourth Proportional to 118,692.69, 163,791.79 and 67,721.91

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Solution

The fourth proportional to 118,692.69, 163,791.79 and 67,721.91 is: 93,453.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,692.69 : 163,791.79 = 67,721.91 : x
  2. Step 2: Convert to fraction form
    118,692.69/163,791.79 = 67,721.91/x
  3. Step 3: Cross multiply
    118,692.69x = 163,791.79 × 67,721.91
  4. Step 4: Simplify right side
    118,692.69x = 11,092,292,861.12
  5. Step 5: Solve for x
    x = 11,092,292,861.12/118,692.69
  6. Step 6: Final answer
    x = 93,453.88

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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.