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Finding the Fourth Proportional to 67,393.79, 101,090.68 and 20,640.59

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Solution

The fourth proportional to 67,393.79, 101,090.68 and 20,640.59 is: 30,960.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,393.79 : 101,090.68 = 20,640.59 : x
  2. Step 2: Convert to fraction form
    67,393.79/101,090.68 = 20,640.59/x
  3. Step 3: Cross multiply
    67,393.79x = 101,090.68 × 20,640.59
  4. Step 4: Simplify right side
    67,393.79x = 2,086,571,216.84
  5. Step 5: Solve for x
    x = 2,086,571,216.84/67,393.79
  6. Step 6: Final answer
    x = 30,960.88

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1.5x scale

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.