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Finding the Fourth Proportional to 203,432.85, 305,094.60 and 85,079.70

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Solution

The fourth proportional to 203,432.85, 305,094.60 and 85,079.70 is: 127,596.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,432.85 : 305,094.60 = 85,079.70 : x
  2. Step 2: Convert to fraction form
    203,432.85/305,094.60 = 85,079.70/x
  3. Step 3: Cross multiply
    203,432.85x = 305,094.60 × 85,079.70
  4. Step 4: Simplify right side
    203,432.85x = 25,957,357,039.62
  5. Step 5: Solve for x
    x = 25,957,357,039.62/203,432.85
  6. Step 6: Final answer
    x = 127,596.68

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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.