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Finding the Fourth Proportional to 68,886.60, 103,329.90 and 68,449.20

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Solution

The fourth proportional to 68,886.60, 103,329.90 and 68,449.20 is: 102,673.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,886.60 : 103,329.90 = 68,449.20 : x
  2. Step 2: Convert to fraction form
    68,886.60/103,329.90 = 68,449.20/x
  3. Step 3: Cross multiply
    68,886.60x = 103,329.90 × 68,449.20
  4. Step 4: Simplify right side
    68,886.60x = 7,072,848,991.08
  5. Step 5: Solve for x
    x = 7,072,848,991.08/68,886.60
  6. Step 6: Final answer
    x = 102,673.80

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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.