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Finding the Fourth Proportional to 67,680.70, 101,501.34 and 20,293.90

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Solution

The fourth proportional to 67,680.70, 101,501.34 and 20,293.90 is: 30,434.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,680.70 : 101,501.34 = 20,293.90 : x
  2. Step 2: Convert to fraction form
    67,680.70/101,501.34 = 20,293.90/x
  3. Step 3: Cross multiply
    67,680.70x = 101,501.34 × 20,293.90
  4. Step 4: Simplify right side
    67,680.70x = 2,059,858,043.83
  5. Step 5: Solve for x
    x = 2,059,858,043.83/67,680.70
  6. Step 6: Final answer
    x = 30,434.94

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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.