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Finding the Fourth Proportional to 61,325.76, 91,997.52 and 21,879.36

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Solution

The fourth proportional to 61,325.76, 91,997.52 and 21,879.36 is: 32,822.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,325.76 : 91,997.52 = 21,879.36 : x
  2. Step 2: Convert to fraction form
    61,325.76/91,997.52 = 21,879.36/x
  3. Step 3: Cross multiply
    61,325.76x = 91,997.52 × 21,879.36
  4. Step 4: Simplify right side
    61,325.76x = 2,012,846,859.19
  5. Step 5: Solve for x
    x = 2,012,846,859.19/61,325.76
  6. Step 6: Final answer
    x = 32,822.21

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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.