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Finding the Fourth Proportional to 55,846.80, 83,640.60 and 38,221.20

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Solution

The fourth proportional to 55,846.80, 83,640.60 and 38,221.20 is: 57,243.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,846.80 : 83,640.60 = 38,221.20 : x
  2. Step 2: Convert to fraction form
    55,846.80/83,640.60 = 38,221.20/x
  3. Step 3: Cross multiply
    55,846.80x = 83,640.60 × 38,221.20
  4. Step 4: Simplify right side
    55,846.80x = 3,196,844,100.72
  5. Step 5: Solve for x
    x = 3,196,844,100.72/55,846.80
  6. Step 6: Final answer
    x = 57,243.10

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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.