Home / 90,084.80-135,144.12-30,928.88

Finding the Fourth Proportional to 90,084.80, 135,144.12 and 30,928.88

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Solution

The fourth proportional to 90,084.80, 135,144.12 and 30,928.88 is: 46,399.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,084.80 : 135,144.12 = 30,928.88 : x
  2. Step 2: Convert to fraction form
    90,084.80/135,144.12 = 30,928.88/x
  3. Step 3: Cross multiply
    90,084.80x = 135,144.12 × 30,928.88
  4. Step 4: Simplify right side
    90,084.80x = 4,179,856,270.19
  5. Step 5: Solve for x
    x = 4,179,856,270.19/90,084.80
  6. Step 6: Final answer
    x = 46,399.13

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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.