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Finding the Fourth Proportional to 79,247.94, 118,872.40 and 20,083.80

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Solution

The fourth proportional to 79,247.94, 118,872.40 and 20,083.80 is: 30,125.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,247.94 : 118,872.40 = 20,083.80 : x
  2. Step 2: Convert to fraction form
    79,247.94/118,872.40 = 20,083.80/x
  3. Step 3: Cross multiply
    79,247.94x = 118,872.40 × 20,083.80
  4. Step 4: Simplify right side
    79,247.94x = 2,387,409,507.12
  5. Step 5: Solve for x
    x = 2,387,409,507.12/79,247.94
  6. Step 6: Final answer
    x = 30,125.82

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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.