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Finding the Fourth Proportional to 90,703.44, 135,961.20 and 65,680.92

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Solution

The fourth proportional to 90,703.44, 135,961.20 and 65,680.92 is: 98,453.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,703.44 : 135,961.20 = 65,680.92 : x
  2. Step 2: Convert to fraction form
    90,703.44/135,961.20 = 65,680.92/x
  3. Step 3: Cross multiply
    90,703.44x = 135,961.20 × 65,680.92
  4. Step 4: Simplify right side
    90,703.44x = 8,930,056,700.30
  5. Step 5: Solve for x
    x = 8,930,056,700.30/90,703.44
  6. Step 6: Final answer
    x = 98,453.34

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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.