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Finding the Fourth Proportional to 68,703.48, 103,103.90 and 31,268.37

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Solution

The fourth proportional to 68,703.48, 103,103.90 and 31,268.37 is: 46,924.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,703.48 : 103,103.90 = 31,268.37 : x
  2. Step 2: Convert to fraction form
    68,703.48/103,103.90 = 31,268.37/x
  3. Step 3: Cross multiply
    68,703.48x = 103,103.90 × 31,268.37
  4. Step 4: Simplify right side
    68,703.48x = 3,223,890,971.81
  5. Step 5: Solve for x
    x = 3,223,890,971.81/68,703.48
  6. Step 6: Final answer
    x = 46,924.71

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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.