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Finding the Fourth Proportional to 100,035.57, 138,043.97 and 54,704.74

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Solution

The fourth proportional to 100,035.57, 138,043.97 and 54,704.74 is: 75,489.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,035.57 : 138,043.97 = 54,704.74 : x
  2. Step 2: Convert to fraction form
    100,035.57/138,043.97 = 54,704.74/x
  3. Step 3: Cross multiply
    100,035.57x = 138,043.97 × 54,704.74
  4. Step 4: Simplify right side
    100,035.57x = 7,551,659,487.42
  5. Step 5: Solve for x
    x = 7,551,659,487.42/100,035.57
  6. Step 6: Final answer
    x = 75,489.74

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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.