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Finding the Fourth Proportional to 68,467.20, 102,700.80 and 40,819.20

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Solution

The fourth proportional to 68,467.20, 102,700.80 and 40,819.20 is: 61,228.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,467.20 : 102,700.80 = 40,819.20 : x
  2. Step 2: Convert to fraction form
    68,467.20/102,700.80 = 40,819.20/x
  3. Step 3: Cross multiply
    68,467.20x = 102,700.80 × 40,819.20
  4. Step 4: Simplify right side
    68,467.20x = 4,192,164,495.36
  5. Step 5: Solve for x
    x = 4,192,164,495.36/68,467.20
  6. Step 6: Final answer
    x = 61,228.80

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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.