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Finding the Fourth Proportional to 66,168.28, 91,301.95 and 39,310.10

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Solution

The fourth proportional to 66,168.28, 91,301.95 and 39,310.10 is: 54,241.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,168.28 : 91,301.95 = 39,310.10 : x
  2. Step 2: Convert to fraction form
    66,168.28/91,301.95 = 39,310.10/x
  3. Step 3: Cross multiply
    66,168.28x = 91,301.95 × 39,310.10
  4. Step 4: Simplify right side
    66,168.28x = 3,589,088,784.70
  5. Step 5: Solve for x
    x = 3,589,088,784.70/66,168.28
  6. Step 6: Final answer
    x = 54,241.83

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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.