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Finding the Fourth Proportional to 68,355.71, 102,532.95 and 21,608.60

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Solution

The fourth proportional to 68,355.71, 102,532.95 and 21,608.60 is: 32,412.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,355.71 : 102,532.95 = 21,608.60 : x
  2. Step 2: Convert to fraction form
    68,355.71/102,532.95 = 21,608.60/x
  3. Step 3: Cross multiply
    68,355.71x = 102,532.95 × 21,608.60
  4. Step 4: Simplify right side
    68,355.71x = 2,215,593,503.37
  5. Step 5: Solve for x
    x = 2,215,593,503.37/68,355.71
  6. Step 6: Final answer
    x = 32,412.71

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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.