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Finding the Fourth Proportional to 69,447.70, 103,874.89 and 57,979.93

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Solution

The fourth proportional to 69,447.70, 103,874.89 and 57,979.93 is: 86,722.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,447.70 : 103,874.89 = 57,979.93 : x
  2. Step 2: Convert to fraction form
    69,447.70/103,874.89 = 57,979.93/x
  3. Step 3: Cross multiply
    69,447.70x = 103,874.89 × 57,979.93
  4. Step 4: Simplify right side
    69,447.70x = 6,022,658,404.06
  5. Step 5: Solve for x
    x = 6,022,658,404.06/69,447.70
  6. Step 6: Final answer
    x = 86,722.21

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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.