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Finding the Fourth Proportional to 69,394.92, 103,924.60 and 39,722.80

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Solution

The fourth proportional to 69,394.92, 103,924.60 and 39,722.80 is: 59,488.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,394.92 : 103,924.60 = 39,722.80 : x
  2. Step 2: Convert to fraction form
    69,394.92/103,924.60 = 39,722.80/x
  3. Step 3: Cross multiply
    69,394.92x = 103,924.60 × 39,722.80
  4. Step 4: Simplify right side
    69,394.92x = 4,128,176,100.88
  5. Step 5: Solve for x
    x = 4,128,176,100.88/69,394.92
  6. Step 6: Final answer
    x = 59,488.16

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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.