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Finding the Fourth Proportional to 55,257.80, 82,789.10 and 53,430.60

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Solution

The fourth proportional to 55,257.80, 82,789.10 and 53,430.60 is: 80,051.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,257.80 : 82,789.10 = 53,430.60 : x
  2. Step 2: Convert to fraction form
    55,257.80/82,789.10 = 53,430.60/x
  3. Step 3: Cross multiply
    55,257.80x = 82,789.10 × 53,430.60
  4. Step 4: Simplify right side
    55,257.80x = 4,423,471,286.46
  5. Step 5: Solve for x
    x = 4,423,471,286.46/55,257.80
  6. Step 6: Final answer
    x = 80,051.53

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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.