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Finding the Fourth Proportional to 67,656.28, 101,472.54 and 20,909.56

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Solution

The fourth proportional to 67,656.28, 101,472.54 and 20,909.56 is: 31,360.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,656.28 : 101,472.54 = 20,909.56 : x
  2. Step 2: Convert to fraction form
    67,656.28/101,472.54 = 20,909.56/x
  3. Step 3: Cross multiply
    67,656.28x = 101,472.54 × 20,909.56
  4. Step 4: Simplify right side
    67,656.28x = 2,121,746,163.48
  5. Step 5: Solve for x
    x = 2,121,746,163.48/67,656.28
  6. Step 6: Final answer
    x = 31,360.67

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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.