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Finding the Fourth Proportional to 72,860, 109,217.04 and 28,425.62

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Solution

The fourth proportional to 72,860, 109,217.04 and 28,425.62 is: 42,609.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,860 : 109,217.04 = 28,425.62 : x
  2. Step 2: Convert to fraction form
    72,860/109,217.04 = 28,425.62/x
  3. Step 3: Cross multiply
    72,860x = 109,217.04 × 28,425.62
  4. Step 4: Simplify right side
    72,860x = 3,104,562,076.56
  5. Step 5: Solve for x
    x = 3,104,562,076.56/72,860
  6. Step 6: Final answer
    x = 42,609.97

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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.