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Finding the Fourth Proportional to 68,779.49, 103,178.42 and 27,216.77

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Solution

The fourth proportional to 68,779.49, 103,178.42 and 27,216.77 is: 40,828.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,779.49 : 103,178.42 = 27,216.77 : x
  2. Step 2: Convert to fraction form
    68,779.49/103,178.42 = 27,216.77/x
  3. Step 3: Cross multiply
    68,779.49x = 103,178.42 × 27,216.77
  4. Step 4: Simplify right side
    68,779.49x = 2,808,183,190.02
  5. Step 5: Solve for x
    x = 2,808,183,190.02/68,779.49
  6. Step 6: Final answer
    x = 40,828.79

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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.