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Finding the Fourth Proportional to 73,120.76, 100,906.76 and 39,586.76

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Solution

The fourth proportional to 73,120.76, 100,906.76 and 39,586.76 is: 54,629.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,120.76 : 100,906.76 = 39,586.76 : x
  2. Step 2: Convert to fraction form
    73,120.76/100,906.76 = 39,586.76/x
  3. Step 3: Cross multiply
    73,120.76x = 100,906.76 × 39,586.76
  4. Step 4: Simplify right side
    73,120.76x = 3,994,571,690.50
  5. Step 5: Solve for x
    x = 3,994,571,690.50/73,120.76
  6. Step 6: Final answer
    x = 54,629.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.