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Finding the Fourth Proportional to 68,385.80, 102,521.10 and 35,553.80

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Solution

The fourth proportional to 68,385.80, 102,521.10 and 35,553.80 is: 53,300.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,385.80 : 102,521.10 = 35,553.80 : x
  2. Step 2: Convert to fraction form
    68,385.80/102,521.10 = 35,553.80/x
  3. Step 3: Cross multiply
    68,385.80x = 102,521.10 × 35,553.80
  4. Step 4: Simplify right side
    68,385.80x = 3,645,014,685.18
  5. Step 5: Solve for x
    x = 3,645,014,685.18/68,385.80
  6. Step 6: Final answer
    x = 53,300.75

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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.