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Finding the Fourth Proportional to 58,729.30, 81,047.03 and 31,872.04

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Solution

The fourth proportional to 58,729.30, 81,047.03 and 31,872.04 is: 43,983.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,729.30 : 81,047.03 = 31,872.04 : x
  2. Step 2: Convert to fraction form
    58,729.30/81,047.03 = 31,872.04/x
  3. Step 3: Cross multiply
    58,729.30x = 81,047.03 × 31,872.04
  4. Step 4: Simplify right side
    58,729.30x = 2,583,133,820.06
  5. Step 5: Solve for x
    x = 2,583,133,820.06/58,729.30
  6. Step 6: Final answer
    x = 43,983.73

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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.