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Finding the Fourth Proportional to 67,391.20, 101,099.76 and 20,644.48

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Solution

The fourth proportional to 67,391.20, 101,099.76 and 20,644.48 is: 30,970.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,391.20 : 101,099.76 = 20,644.48 : x
  2. Step 2: Convert to fraction form
    67,391.20/101,099.76 = 20,644.48/x
  3. Step 3: Cross multiply
    67,391.20x = 101,099.76 × 20,644.48
  4. Step 4: Simplify right side
    67,391.20x = 2,087,151,973.32
  5. Step 5: Solve for x
    x = 2,087,151,973.32/67,391.20
  6. Step 6: Final answer
    x = 30,970.69

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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.