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Finding the Fourth Proportional to 55,490.37, 83,243.85 and 20,427.36

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Solution

The fourth proportional to 55,490.37, 83,243.85 and 20,427.36 is: 30,644.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,490.37 : 83,243.85 = 20,427.36 : x
  2. Step 2: Convert to fraction form
    55,490.37/83,243.85 = 20,427.36/x
  3. Step 3: Cross multiply
    55,490.37x = 83,243.85 × 20,427.36
  4. Step 4: Simplify right side
    55,490.37x = 1,700,452,091.74
  5. Step 5: Solve for x
    x = 1,700,452,091.74/55,490.37
  6. Step 6: Final answer
    x = 30,644.09

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.