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Finding the Fourth Proportional to 68,632.80, 102,872.40 and 39,064.80

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Solution

The fourth proportional to 68,632.80, 102,872.40 and 39,064.80 is: 58,553.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,632.80 : 102,872.40 = 39,064.80 : x
  2. Step 2: Convert to fraction form
    68,632.80/102,872.40 = 39,064.80/x
  3. Step 3: Cross multiply
    68,632.80x = 102,872.40 × 39,064.80
  4. Step 4: Simplify right side
    68,632.80x = 4,018,689,731.52
  5. Step 5: Solve for x
    x = 4,018,689,731.52/68,632.80
  6. Step 6: Final answer
    x = 58,553.49

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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.