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Finding the Fourth Proportional to 125,185, 172,755.30 and 72,193

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Solution

The fourth proportional to 125,185, 172,755.30 and 72,193 is: 99,626.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,185 : 172,755.30 = 72,193 : x
  2. Step 2: Convert to fraction form
    125,185/172,755.30 = 72,193/x
  3. Step 3: Cross multiply
    125,185x = 172,755.30 × 72,193
  4. Step 4: Simplify right side
    125,185x = 12,471,723,372.90
  5. Step 5: Solve for x
    x = 12,471,723,372.90/125,185
  6. Step 6: Final answer
    x = 99,626.34

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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.