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Finding the Fourth Proportional to 55,309.80, 83,007.90 and 25,731.30

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Solution

The fourth proportional to 55,309.80, 83,007.90 and 25,731.30 is: 38,617.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,309.80 : 83,007.90 = 25,731.30 : x
  2. Step 2: Convert to fraction form
    55,309.80/83,007.90 = 25,731.30/x
  3. Step 3: Cross multiply
    55,309.80x = 83,007.90 × 25,731.30
  4. Step 4: Simplify right side
    55,309.80x = 2,135,901,177.27
  5. Step 5: Solve for x
    x = 2,135,901,177.27/55,309.80
  6. Step 6: Final answer
    x = 38,617.05

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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.