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Finding the Fourth Proportional to 172,991.64, 259,530.66 and 48,331.56

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Solution

The fourth proportional to 172,991.64, 259,530.66 and 48,331.56 is: 72,509.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,991.64 : 259,530.66 = 48,331.56 : x
  2. Step 2: Convert to fraction form
    172,991.64/259,530.66 = 48,331.56/x
  3. Step 3: Cross multiply
    172,991.64x = 259,530.66 × 48,331.56
  4. Step 4: Simplify right side
    172,991.64x = 12,543,521,665.63
  5. Step 5: Solve for x
    x = 12,543,521,665.63/172,991.64
  6. Step 6: Final answer
    x = 72,509.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.