Home / 90,129.60-135,271.20-40,286.40

Finding the Fourth Proportional to 90,129.60, 135,271.20 and 40,286.40

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Solution

The fourth proportional to 90,129.60, 135,271.20 and 40,286.40 is: 60,463.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,129.60 : 135,271.20 = 40,286.40 : x
  2. Step 2: Convert to fraction form
    90,129.60/135,271.20 = 40,286.40/x
  3. Step 3: Cross multiply
    90,129.60x = 135,271.20 × 40,286.40
  4. Step 4: Simplify right side
    90,129.60x = 5,449,589,671.68
  5. Step 5: Solve for x
    x = 5,449,589,671.68/90,129.60
  6. Step 6: Final answer
    x = 60,463.93

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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.