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Finding the Fourth Proportional to 68,835.70, 103,247.44 and 21,448.80

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Solution

The fourth proportional to 68,835.70, 103,247.44 and 21,448.80 is: 32,171.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,835.70 : 103,247.44 = 21,448.80 : x
  2. Step 2: Convert to fraction form
    68,835.70/103,247.44 = 21,448.80/x
  3. Step 3: Cross multiply
    68,835.70x = 103,247.44 × 21,448.80
  4. Step 4: Simplify right side
    68,835.70x = 2,214,533,691.07
  5. Step 5: Solve for x
    x = 2,214,533,691.07/68,835.70
  6. Step 6: Final answer
    x = 32,171.30

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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.