Home / 90,858.38-136,288.78-28,528.88

Finding the Fourth Proportional to 90,858.38, 136,288.78 and 28,528.88

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Solution

The fourth proportional to 90,858.38, 136,288.78 and 28,528.88 is: 42,793.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,858.38 : 136,288.78 = 28,528.88 : x
  2. Step 2: Convert to fraction form
    90,858.38/136,288.78 = 28,528.88/x
  3. Step 3: Cross multiply
    90,858.38x = 136,288.78 × 28,528.88
  4. Step 4: Simplify right side
    90,858.38x = 3,888,165,497.20
  5. Step 5: Solve for x
    x = 3,888,165,497.20/90,858.38
  6. Step 6: Final answer
    x = 42,793.69

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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.