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Finding the Fourth Proportional to 69,345.88, 95,690.34 and 39,128.44

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Solution

The fourth proportional to 69,345.88, 95,690.34 and 39,128.44 is: 53,993.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,345.88 : 95,690.34 = 39,128.44 : x
  2. Step 2: Convert to fraction form
    69,345.88/95,690.34 = 39,128.44/x
  3. Step 3: Cross multiply
    69,345.88x = 95,690.34 × 39,128.44
  4. Step 4: Simplify right side
    69,345.88x = 3,744,213,727.27
  5. Step 5: Solve for x
    x = 3,744,213,727.27/69,345.88
  6. Step 6: Final answer
    x = 53,993.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.