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Finding the Fourth Proportional to 118,692.06, 163,790.96 and 67,721.31

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Solution

The fourth proportional to 118,692.06, 163,790.96 and 67,721.31 is: 93,453.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,692.06 : 163,790.96 = 67,721.31 : x
  2. Step 2: Convert to fraction form
    118,692.06/163,790.96 = 67,721.31/x
  3. Step 3: Cross multiply
    118,692.06x = 163,790.96 × 67,721.31
  4. Step 4: Simplify right side
    118,692.06x = 11,092,138,038.75
  5. Step 5: Solve for x
    x = 11,092,138,038.75/118,692.06
  6. Step 6: Final answer
    x = 93,453.08

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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.