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Finding the Fourth Proportional to 55,917.80, 83,847.90 and 20,839.40

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Solution

The fourth proportional to 55,917.80, 83,847.90 and 20,839.40 is: 31,248.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,917.80 : 83,847.90 = 20,839.40 : x
  2. Step 2: Convert to fraction form
    55,917.80/83,847.90 = 20,839.40/x
  3. Step 3: Cross multiply
    55,917.80x = 83,847.90 × 20,839.40
  4. Step 4: Simplify right side
    55,917.80x = 1,747,339,927.26
  5. Step 5: Solve for x
    x = 1,747,339,927.26/55,917.80
  6. Step 6: Final answer
    x = 31,248.37

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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.