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Finding the Fourth Proportional to 90,139.97, 135,213.32 and 26,960.91

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Solution

The fourth proportional to 90,139.97, 135,213.32 and 26,960.91 is: 40,442.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,139.97 : 135,213.32 = 26,960.91 : x
  2. Step 2: Convert to fraction form
    90,139.97/135,213.32 = 26,960.91/x
  3. Step 3: Cross multiply
    90,139.97x = 135,213.32 × 26,960.91
  4. Step 4: Simplify right side
    90,139.97x = 3,645,474,218.72
  5. Step 5: Solve for x
    x = 3,645,474,218.72/90,139.97
  6. Step 6: Final answer
    x = 40,442.37

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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.