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Finding the Fourth Proportional to 61,222.70, 91,736.85 and 40,421.90

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Solution

The fourth proportional to 61,222.70, 91,736.85 and 40,421.90 is: 60,568.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,222.70 : 91,736.85 = 40,421.90 : x
  2. Step 2: Convert to fraction form
    61,222.70/91,736.85 = 40,421.90/x
  3. Step 3: Cross multiply
    61,222.70x = 91,736.85 × 40,421.90
  4. Step 4: Simplify right side
    61,222.70x = 3,708,177,777.02
  5. Step 5: Solve for x
    x = 3,708,177,777.02/61,222.70
  6. Step 6: Final answer
    x = 60,568.67

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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.