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Finding the Fourth Proportional to 56,124.75, 84,229.95 and 20,619.71

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Solution

The fourth proportional to 56,124.75, 84,229.95 and 20,619.71 is: 30,945.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,124.75 : 84,229.95 = 20,619.71 : x
  2. Step 2: Convert to fraction form
    56,124.75/84,229.95 = 20,619.71/x
  3. Step 3: Cross multiply
    56,124.75x = 84,229.95 × 20,619.71
  4. Step 4: Simplify right side
    56,124.75x = 1,736,797,530.15
  5. Step 5: Solve for x
    x = 1,736,797,530.15/56,124.75
  6. Step 6: Final answer
    x = 30,945.31

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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.