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Finding the Fourth Proportional to 58,695.82, 87,991.11 and 21,247.12

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Solution

The fourth proportional to 58,695.82, 87,991.11 and 21,247.12 is: 31,851.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,695.82 : 87,991.11 = 21,247.12 : x
  2. Step 2: Convert to fraction form
    58,695.82/87,991.11 = 21,247.12/x
  3. Step 3: Cross multiply
    58,695.82x = 87,991.11 × 21,247.12
  4. Step 4: Simplify right side
    58,695.82x = 1,869,557,673.10
  5. Step 5: Solve for x
    x = 1,869,557,673.10/58,695.82
  6. Step 6: Final answer
    x = 31,851.63

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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.