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Finding the Fourth Proportional to 68,665.80, 102,927.69 and 39,019.80

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Solution

The fourth proportional to 68,665.80, 102,927.69 and 39,019.80 is: 58,489.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,665.80 : 102,927.69 = 39,019.80 : x
  2. Step 2: Convert to fraction form
    68,665.80/102,927.69 = 39,019.80/x
  3. Step 3: Cross multiply
    68,665.80x = 102,927.69 × 39,019.80
  4. Step 4: Simplify right side
    68,665.80x = 4,016,217,878.26
  5. Step 5: Solve for x
    x = 4,016,217,878.26/68,665.80
  6. Step 6: Final answer
    x = 58,489.35

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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.