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Finding the Fourth Proportional to 203,897.55, 305,890.10 and 79,238.55

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Solution

The fourth proportional to 203,897.55, 305,890.10 and 79,238.55 is: 118,874.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,897.55 : 305,890.10 = 79,238.55 : x
  2. Step 2: Convert to fraction form
    203,897.55/305,890.10 = 79,238.55/x
  3. Step 3: Cross multiply
    203,897.55x = 305,890.10 × 79,238.55
  4. Step 4: Simplify right side
    203,897.55x = 24,238,287,587.16
  5. Step 5: Solve for x
    x = 24,238,287,587.16/203,897.55
  6. Step 6: Final answer
    x = 118,874.83

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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.