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Finding the Fourth Proportional to 65,723.69, 90,700.50 and 40,229.55

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Solution

The fourth proportional to 65,723.69, 90,700.50 and 40,229.55 is: 55,517.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,723.69 : 90,700.50 = 40,229.55 : x
  2. Step 2: Convert to fraction form
    65,723.69/90,700.50 = 40,229.55/x
  3. Step 3: Cross multiply
    65,723.69x = 90,700.50 × 40,229.55
  4. Step 4: Simplify right side
    65,723.69x = 3,648,840,299.78
  5. Step 5: Solve for x
    x = 3,648,840,299.78/65,723.69
  6. Step 6: Final answer
    x = 55,517.89

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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.