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Finding the Fourth Proportional to 125,091.54, 172,626.37 and 67,730.87

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Solution

The fourth proportional to 125,091.54, 172,626.37 and 67,730.87 is: 93,468.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,091.54 : 172,626.37 = 67,730.87 : x
  2. Step 2: Convert to fraction form
    125,091.54/172,626.37 = 67,730.87/x
  3. Step 3: Cross multiply
    125,091.54x = 172,626.37 × 67,730.87
  4. Step 4: Simplify right side
    125,091.54x = 11,692,134,487.28
  5. Step 5: Solve for x
    x = 11,692,134,487.28/125,091.54
  6. Step 6: Final answer
    x = 93,468.63

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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.