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Finding the Fourth Proportional to 72,912.72, 109,369.08 and 41,725.92

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Solution

The fourth proportional to 72,912.72, 109,369.08 and 41,725.92 is: 62,588.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,912.72 : 109,369.08 = 41,725.92 : x
  2. Step 2: Convert to fraction form
    72,912.72/109,369.08 = 41,725.92/x
  3. Step 3: Cross multiply
    72,912.72x = 109,369.08 × 41,725.92
  4. Step 4: Simplify right side
    72,912.72x = 4,563,525,482.55
  5. Step 5: Solve for x
    x = 4,563,525,482.55/72,912.72
  6. Step 6: Final answer
    x = 62,588.88

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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.