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Finding the Fourth Proportional to 90,310.72, 135,479.04 and 27,986.08

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Solution

The fourth proportional to 90,310.72, 135,479.04 and 27,986.08 is: 41,983.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,310.72 : 135,479.04 = 27,986.08 : x
  2. Step 2: Convert to fraction form
    90,310.72/135,479.04 = 27,986.08/x
  3. Step 3: Cross multiply
    90,310.72x = 135,479.04 × 27,986.08
  4. Step 4: Simplify right side
    90,310.72x = 3,791,527,251.76
  5. Step 5: Solve for x
    x = 3,791,527,251.76/90,310.72
  6. Step 6: Final answer
    x = 41,983.14

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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.