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Finding the Fourth Proportional to 68,779.52, 103,169.31 and 45,400.49

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Solution

The fourth proportional to 68,779.52, 103,169.31 and 45,400.49 is: 68,100.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,779.52 : 103,169.31 = 45,400.49 : x
  2. Step 2: Convert to fraction form
    68,779.52/103,169.31 = 45,400.49/x
  3. Step 3: Cross multiply
    68,779.52x = 103,169.31 × 45,400.49
  4. Step 4: Simplify right side
    68,779.52x = 4,683,937,226.96
  5. Step 5: Solve for x
    x = 4,683,937,226.96/68,779.52
  6. Step 6: Final answer
    x = 68,100.75

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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.