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Finding the Fourth Proportional to 85,493.85, 128,242.97 and 40,504.67

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Solution

The fourth proportional to 85,493.85, 128,242.97 and 40,504.67 is: 60,758.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,493.85 : 128,242.97 = 40,504.67 : x
  2. Step 2: Convert to fraction form
    85,493.85/128,242.97 = 40,504.67/x
  3. Step 3: Cross multiply
    85,493.85x = 128,242.97 × 40,504.67
  4. Step 4: Simplify right side
    85,493.85x = 5,194,438,335.93
  5. Step 5: Solve for x
    x = 5,194,438,335.93/85,493.85
  6. Step 6: Final answer
    x = 60,758.04

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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.