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Finding the Fourth Proportional to 60,949.10, 91,400.90 and 20,956.76

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Solution

The fourth proportional to 60,949.10, 91,400.90 and 20,956.76 is: 31,427.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,949.10 : 91,400.90 = 20,956.76 : x
  2. Step 2: Convert to fraction form
    60,949.10/91,400.90 = 20,956.76/x
  3. Step 3: Cross multiply
    60,949.10x = 91,400.90 × 20,956.76
  4. Step 4: Simplify right side
    60,949.10x = 1,915,466,163.30
  5. Step 5: Solve for x
    x = 1,915,466,163.30/60,949.10
  6. Step 6: Final answer
    x = 31,427.31

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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.