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Finding the Fourth Proportional to 68,736.60, 103,046.37 and 31,283.55

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Solution

The fourth proportional to 68,736.60, 103,046.37 and 31,283.55 is: 46,898.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,736.60 : 103,046.37 = 31,283.55 : x
  2. Step 2: Convert to fraction form
    68,736.60/103,046.37 = 31,283.55/x
  3. Step 3: Cross multiply
    68,736.60x = 103,046.37 × 31,283.55
  4. Step 4: Simplify right side
    68,736.60x = 3,223,656,268.21
  5. Step 5: Solve for x
    x = 3,223,656,268.21/68,736.60
  6. Step 6: Final answer
    x = 46,898.69

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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.