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Finding the Fourth Proportional to 351,429.06, 527,138.87 and 85,191.87

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Solution

The fourth proportional to 351,429.06, 527,138.87 and 85,191.87 is: 127,786.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,429.06 : 527,138.87 = 85,191.87 : x
  2. Step 2: Convert to fraction form
    351,429.06/527,138.87 = 85,191.87/x
  3. Step 3: Cross multiply
    351,429.06x = 527,138.87 × 85,191.87
  4. Step 4: Simplify right side
    351,429.06x = 44,907,945,659.03
  5. Step 5: Solve for x
    x = 44,907,945,659.03/351,429.06
  6. Step 6: Final answer
    x = 127,786.66

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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.