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Finding the Fourth Proportional to 69,209.80, 103,668.90 and 56,087.80

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Solution

The fourth proportional to 69,209.80, 103,668.90 and 56,087.80 is: 84,013.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,209.80 : 103,668.90 = 56,087.80 : x
  2. Step 2: Convert to fraction form
    69,209.80/103,668.90 = 56,087.80/x
  3. Step 3: Cross multiply
    69,209.80x = 103,668.90 × 56,087.80
  4. Step 4: Simplify right side
    69,209.80x = 5,814,560,529.42
  5. Step 5: Solve for x
    x = 5,814,560,529.42/69,209.80
  6. Step 6: Final answer
    x = 84,013.54

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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.