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Finding the Fourth Proportional to 68,356.48, 102,535.36 and 21,609.60

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Solution

The fourth proportional to 68,356.48, 102,535.36 and 21,609.60 is: 32,414.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,356.48 : 102,535.36 = 21,609.60 : x
  2. Step 2: Convert to fraction form
    68,356.48/102,535.36 = 21,609.60/x
  3. Step 3: Cross multiply
    68,356.48x = 102,535.36 × 21,609.60
  4. Step 4: Simplify right side
    68,356.48x = 2,215,748,115.46
  5. Step 5: Solve for x
    x = 2,215,748,115.46/68,356.48
  6. Step 6: Final answer
    x = 32,414.60

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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.