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Finding the Fourth Proportional to 84,272.21, 126,359.41 and 39,898.59

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Solution

The fourth proportional to 84,272.21, 126,359.41 and 39,898.59 is: 59,824.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,272.21 : 126,359.41 = 39,898.59 : x
  2. Step 2: Convert to fraction form
    84,272.21/126,359.41 = 39,898.59/x
  3. Step 3: Cross multiply
    84,272.21x = 126,359.41 × 39,898.59
  4. Step 4: Simplify right side
    84,272.21x = 5,041,562,092.74
  5. Step 5: Solve for x
    x = 5,041,562,092.74/84,272.21
  6. Step 6: Final answer
    x = 59,824.73

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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.