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Finding the Fourth Proportional to 68,554.80, 102,755.40 and 38,986.80

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Solution

The fourth proportional to 68,554.80, 102,755.40 and 38,986.80 is: 58,436.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,554.80 : 102,755.40 = 38,986.80 : x
  2. Step 2: Convert to fraction form
    68,554.80/102,755.40 = 38,986.80/x
  3. Step 3: Cross multiply
    68,554.80x = 102,755.40 × 38,986.80
  4. Step 4: Simplify right side
    68,554.80x = 4,006,104,228.72
  5. Step 5: Solve for x
    x = 4,006,104,228.72/68,554.80
  6. Step 6: Final answer
    x = 58,436.52

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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.