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Finding the Fourth Proportional to 92,728.80, 139,093.50 and 33,540.68

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Solution

The fourth proportional to 92,728.80, 139,093.50 and 33,540.68 is: 50,311.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,728.80 : 139,093.50 = 33,540.68 : x
  2. Step 2: Convert to fraction form
    92,728.80/139,093.50 = 33,540.68/x
  3. Step 3: Cross multiply
    92,728.80x = 139,093.50 × 33,540.68
  4. Step 4: Simplify right side
    92,728.80x = 4,665,291,047.09
  5. Step 5: Solve for x
    x = 4,665,291,047.09/92,728.80
  6. Step 6: Final answer
    x = 50,311.13

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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.