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Finding the Fourth Proportional to 79,247.71, 118,871.35 and 20,083.21

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Solution

The fourth proportional to 79,247.71, 118,871.35 and 20,083.21 is: 30,124.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,247.71 : 118,871.35 = 20,083.21 : x
  2. Step 2: Convert to fraction form
    79,247.71/118,871.35 = 20,083.21/x
  3. Step 3: Cross multiply
    79,247.71x = 118,871.35 × 20,083.21
  4. Step 4: Simplify right side
    79,247.71x = 2,387,318,285.03
  5. Step 5: Solve for x
    x = 2,387,318,285.03/79,247.71
  6. Step 6: Final answer
    x = 30,124.76

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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.