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Finding the Fourth Proportional to 90,107.13, 135,216.29 and 45,765.71

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Solution

The fourth proportional to 90,107.13, 135,216.29 and 45,765.71 is: 68,676.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,107.13 : 135,216.29 = 45,765.71 : x
  2. Step 2: Convert to fraction form
    90,107.13/135,216.29 = 45,765.71/x
  3. Step 3: Cross multiply
    90,107.13x = 135,216.29 × 45,765.71
  4. Step 4: Simplify right side
    90,107.13x = 6,188,269,515.42
  5. Step 5: Solve for x
    x = 6,188,269,515.42/90,107.13
  6. Step 6: Final answer
    x = 68,676.80

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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.