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Finding the Fourth Proportional to 55,695.48, 83,489.94 and 20,625.72

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Solution

The fourth proportional to 55,695.48, 83,489.94 and 20,625.72 is: 30,918.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,695.48 : 83,489.94 = 20,625.72 : x
  2. Step 2: Convert to fraction form
    55,695.48/83,489.94 = 20,625.72/x
  3. Step 3: Cross multiply
    55,695.48x = 83,489.94 × 20,625.72
  4. Step 4: Simplify right side
    55,695.48x = 1,722,040,125.26
  5. Step 5: Solve for x
    x = 1,722,040,125.26/55,695.48
  6. Step 6: Final answer
    x = 30,918.85

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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.