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Finding the Fourth Proportional to 84,612.94, 126,919.71 and 21,433.03

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Solution

The fourth proportional to 84,612.94, 126,919.71 and 21,433.03 is: 32,149.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,612.94 : 126,919.71 = 21,433.03 : x
  2. Step 2: Convert to fraction form
    84,612.94/126,919.71 = 21,433.03/x
  3. Step 3: Cross multiply
    84,612.94x = 126,919.71 × 21,433.03
  4. Step 4: Simplify right side
    84,612.94x = 2,720,273,952.02
  5. Step 5: Solve for x
    x = 2,720,273,952.02/84,612.94
  6. Step 6: Final answer
    x = 32,149.62

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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.