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Finding the Fourth Proportional to 351,885.56, 527,820.94 and 85,647.56

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Solution

The fourth proportional to 351,885.56, 527,820.94 and 85,647.56 is: 128,469.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,885.56 : 527,820.94 = 85,647.56 : x
  2. Step 2: Convert to fraction form
    351,885.56/527,820.94 = 85,647.56/x
  3. Step 3: Cross multiply
    351,885.56x = 527,820.94 × 85,647.56
  4. Step 4: Simplify right side
    351,885.56x = 45,206,575,627.91
  5. Step 5: Solve for x
    x = 45,206,575,627.91/351,885.56
  6. Step 6: Final answer
    x = 128,469.54

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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.