Home / 90,422.00-135,640.38-45,420.21

Finding the Fourth Proportional to 90,422.00, 135,640.38 and 45,420.21

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Solution

The fourth proportional to 90,422.00, 135,640.38 and 45,420.21 is: 68,134.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,422.00 : 135,640.38 = 45,420.21 : x
  2. Step 2: Convert to fraction form
    90,422.00/135,640.38 = 45,420.21/x
  3. Step 3: Cross multiply
    90,422.00x = 135,640.38 × 45,420.21
  4. Step 4: Simplify right side
    90,422.00x = 6,160,814,035.43
  5. Step 5: Solve for x
    x = 6,160,814,035.43/90,422.00
  6. Step 6: Final answer
    x = 68,134.01

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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.