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Finding the Fourth Proportional to 72,808.35, 109,197.95 and 20,203.71

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Solution

The fourth proportional to 72,808.35, 109,197.95 and 20,203.71 is: 30,301.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,808.35 : 109,197.95 = 20,203.71 : x
  2. Step 2: Convert to fraction form
    72,808.35/109,197.95 = 20,203.71/x
  3. Step 3: Cross multiply
    72,808.35x = 109,197.95 × 20,203.71
  4. Step 4: Simplify right side
    72,808.35x = 2,206,203,613.38
  5. Step 5: Solve for x
    x = 2,206,203,613.38/72,808.35
  6. Step 6: Final answer
    x = 30,301.52

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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.