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Finding the Fourth Proportional to 61,819.65, 85,286.97 and 40,334.67

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Solution

The fourth proportional to 61,819.65, 85,286.97 and 40,334.67 is: 55,646.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,819.65 : 85,286.97 = 40,334.67 : x
  2. Step 2: Convert to fraction form
    61,819.65/85,286.97 = 40,334.67/x
  3. Step 3: Cross multiply
    61,819.65x = 85,286.97 × 40,334.67
  4. Step 4: Simplify right side
    61,819.65x = 3,440,021,790.25
  5. Step 5: Solve for x
    x = 3,440,021,790.25/61,819.65
  6. Step 6: Final answer
    x = 55,646.09

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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.