Home / 90,143.10-135,236.79-30,979.62

Finding the Fourth Proportional to 90,143.10, 135,236.79 and 30,979.62

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Solution

The fourth proportional to 90,143.10, 135,236.79 and 30,979.62 is: 46,477.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,143.10 : 135,236.79 = 30,979.62 : x
  2. Step 2: Convert to fraction form
    90,143.10/135,236.79 = 30,979.62/x
  3. Step 3: Cross multiply
    90,143.10x = 135,236.79 × 30,979.62
  4. Step 4: Simplify right side
    90,143.10x = 4,189,584,364.22
  5. Step 5: Solve for x
    x = 4,189,584,364.22/90,143.10
  6. Step 6: Final answer
    x = 46,477.04

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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.