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Finding the Fourth Proportional to 201,511.79, 302,230.09 and 81,537.30

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Solution

The fourth proportional to 201,511.79, 302,230.09 and 81,537.30 is: 122,290.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,511.79 : 302,230.09 = 81,537.30 : x
  2. Step 2: Convert to fraction form
    201,511.79/302,230.09 = 81,537.30/x
  3. Step 3: Cross multiply
    201,511.79x = 302,230.09 × 81,537.30
  4. Step 4: Simplify right side
    201,511.79x = 24,643,025,517.36
  5. Step 5: Solve for x
    x = 24,643,025,517.36/201,511.79
  6. Step 6: Final answer
    x = 122,290.74

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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.