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Finding the Fourth Proportional to 68,272.48, 102,408.72 and 21,530.08

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Solution

The fourth proportional to 68,272.48, 102,408.72 and 21,530.08 is: 32,295.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,272.48 : 102,408.72 = 21,530.08 : x
  2. Step 2: Convert to fraction form
    68,272.48/102,408.72 = 21,530.08/x
  3. Step 3: Cross multiply
    68,272.48x = 102,408.72 × 21,530.08
  4. Step 4: Simplify right side
    68,272.48x = 2,204,867,934.30
  5. Step 5: Solve for x
    x = 2,204,867,934.30/68,272.48
  6. Step 6: Final answer
    x = 32,295.12

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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.