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Finding the Fourth Proportional to 72,908.44, 100,613.62 and 39,374.44

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Solution

The fourth proportional to 72,908.44, 100,613.62 and 39,374.44 is: 54,336.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,908.44 : 100,613.62 = 39,374.44 : x
  2. Step 2: Convert to fraction form
    72,908.44/100,613.62 = 39,374.44/x
  3. Step 3: Cross multiply
    72,908.44x = 100,613.62 × 39,374.44
  4. Step 4: Simplify right side
    72,908.44x = 3,961,604,342.37
  5. Step 5: Solve for x
    x = 3,961,604,342.37/72,908.44
  6. Step 6: Final answer
    x = 54,336.71

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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.