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Finding the Fourth Proportional to 69,063.89, 103,371.05 and 38,618.80

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Solution

The fourth proportional to 69,063.89, 103,371.05 and 38,618.80 is: 57,802.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,063.89 : 103,371.05 = 38,618.80 : x
  2. Step 2: Convert to fraction form
    69,063.89/103,371.05 = 38,618.80/x
  3. Step 3: Cross multiply
    69,063.89x = 103,371.05 × 38,618.80
  4. Step 4: Simplify right side
    69,063.89x = 3,992,065,743.86
  5. Step 5: Solve for x
    x = 3,992,065,743.86/69,063.89
  6. Step 6: Final answer
    x = 57,802.51

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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.