Home / 65,451.96-90,321.21-40,000.91

Finding the Fourth Proportional to 65,451.96, 90,321.21 and 40,000.91

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Solution

The fourth proportional to 65,451.96, 90,321.21 and 40,000.91 is: 55,199.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,451.96 : 90,321.21 = 40,000.91 : x
  2. Step 2: Convert to fraction form
    65,451.96/90,321.21 = 40,000.91/x
  3. Step 3: Cross multiply
    65,451.96x = 90,321.21 × 40,000.91
  4. Step 4: Simplify right side
    65,451.96x = 3,612,930,140.70
  5. Step 5: Solve for x
    x = 3,612,930,140.70/65,451.96
  6. Step 6: Final answer
    x = 55,199.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.