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Finding the Fourth Proportional to 90,259.64, 135,438.44 and 37,673.72

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Solution

The fourth proportional to 90,259.64, 135,438.44 and 37,673.72 is: 56,531.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,259.64 : 135,438.44 = 37,673.72 : x
  2. Step 2: Convert to fraction form
    90,259.64/135,438.44 = 37,673.72/x
  3. Step 3: Cross multiply
    90,259.64x = 135,438.44 × 37,673.72
  4. Step 4: Simplify right side
    90,259.64x = 5,102,469,865.80
  5. Step 5: Solve for x
    x = 5,102,469,865.80/90,259.64
  6. Step 6: Final answer
    x = 56,531.02

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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.