Home / 90,408.03-135,640.20-54,423.59

Finding the Fourth Proportional to 90,408.03, 135,640.20 and 54,423.59

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Solution

The fourth proportional to 90,408.03, 135,640.20 and 54,423.59 is: 81,652.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,408.03 : 135,640.20 = 54,423.59 : x
  2. Step 2: Convert to fraction form
    90,408.03/135,640.20 = 54,423.59/x
  3. Step 3: Cross multiply
    90,408.03x = 135,640.20 × 54,423.59
  4. Step 4: Simplify right side
    90,408.03x = 7,382,025,954.12
  5. Step 5: Solve for x
    x = 7,382,025,954.12/90,408.03
  6. Step 6: Final answer
    x = 81,652.33

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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.