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Finding the Fourth Proportional to 72,930.22, 109,592.97 and 39,674.86

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Solution

The fourth proportional to 72,930.22, 109,592.97 and 39,674.86 is: 59,619.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,930.22 : 109,592.97 = 39,674.86 : x
  2. Step 2: Convert to fraction form
    72,930.22/109,592.97 = 39,674.86/x
  3. Step 3: Cross multiply
    72,930.22x = 109,592.97 × 39,674.86
  4. Step 4: Simplify right side
    72,930.22x = 4,348,085,741.73
  5. Step 5: Solve for x
    x = 4,348,085,741.73/72,930.22
  6. Step 6: Final answer
    x = 59,619.81

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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.