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Finding the Fourth Proportional to 68,107.65, 102,072.63 and 42,451.38

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Solution

The fourth proportional to 68,107.65, 102,072.63 and 42,451.38 is: 63,621.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,107.65 : 102,072.63 = 42,451.38 : x
  2. Step 2: Convert to fraction form
    68,107.65/102,072.63 = 42,451.38/x
  3. Step 3: Cross multiply
    68,107.65x = 102,072.63 × 42,451.38
  4. Step 4: Simplify right side
    68,107.65x = 4,333,124,003.73
  5. Step 5: Solve for x
    x = 4,333,124,003.73/68,107.65
  6. Step 6: Final answer
    x = 63,621.69

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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.