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Finding the Fourth Proportional to 201,212.72, 301,631.45 and 67,999.82

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Solution

The fourth proportional to 201,212.72, 301,631.45 and 67,999.82 is: 101,936.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,212.72 : 301,631.45 = 67,999.82 : x
  2. Step 2: Convert to fraction form
    201,212.72/301,631.45 = 67,999.82/x
  3. Step 3: Cross multiply
    201,212.72x = 301,631.45 × 67,999.82
  4. Step 4: Simplify right side
    201,212.72x = 20,510,884,306.34
  5. Step 5: Solve for x
    x = 20,510,884,306.34/201,212.72
  6. Step 6: Final answer
    x = 101,936.32

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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.