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Finding the Fourth Proportional to 64,279.20, 96,415.20 and 19,905.60

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Solution

The fourth proportional to 64,279.20, 96,415.20 and 19,905.60 is: 29,857.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,279.20 : 96,415.20 = 19,905.60 : x
  2. Step 2: Convert to fraction form
    64,279.20/96,415.20 = 19,905.60/x
  3. Step 3: Cross multiply
    64,279.20x = 96,415.20 × 19,905.60
  4. Step 4: Simplify right side
    64,279.20x = 1,919,202,405.12
  5. Step 5: Solve for x
    x = 1,919,202,405.12/64,279.20
  6. Step 6: Final answer
    x = 29,857.29

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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.