Home / 45,855.78-68,783.94-20,878.36

Finding the Fourth Proportional to 45,855.78, 68,783.94 and 20,878.36

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Solution

The fourth proportional to 45,855.78, 68,783.94 and 20,878.36 is: 31,317.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,855.78 : 68,783.94 = 20,878.36 : x
  2. Step 2: Convert to fraction form
    45,855.78/68,783.94 = 20,878.36/x
  3. Step 3: Cross multiply
    45,855.78x = 68,783.94 × 20,878.36
  4. Step 4: Simplify right side
    45,855.78x = 1,436,095,861.54
  5. Step 5: Solve for x
    x = 1,436,095,861.54/45,855.78
  6. Step 6: Final answer
    x = 31,317.66

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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.