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Finding the Fourth Proportional to 65,891.20, 90,952.05 and 40,049.67

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Solution

The fourth proportional to 65,891.20, 90,952.05 and 40,049.67 is: 55,282.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,891.20 : 90,952.05 = 40,049.67 : x
  2. Step 2: Convert to fraction form
    65,891.20/90,952.05 = 40,049.67/x
  3. Step 3: Cross multiply
    65,891.20x = 90,952.05 × 40,049.67
  4. Step 4: Simplify right side
    65,891.20x = 3,642,599,255.85
  5. Step 5: Solve for x
    x = 3,642,599,255.85/65,891.20
  6. Step 6: Final answer
    x = 55,282.03

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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.