Home / 90,613.72-135,921.30-28,286.20

Finding the Fourth Proportional to 90,613.72, 135,921.30 and 28,286.20

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Solution

The fourth proportional to 90,613.72, 135,921.30 and 28,286.20 is: 42,429.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,613.72 : 135,921.30 = 28,286.20 : x
  2. Step 2: Convert to fraction form
    90,613.72/135,921.30 = 28,286.20/x
  3. Step 3: Cross multiply
    90,613.72x = 135,921.30 × 28,286.20
  4. Step 4: Simplify right side
    90,613.72x = 3,844,697,076.06
  5. Step 5: Solve for x
    x = 3,844,697,076.06/90,613.72
  6. Step 6: Final answer
    x = 42,429.52

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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.