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Finding the Fourth Proportional to 68,954,317.65, 103,400,350.67 and 19,758,918.60

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Solution

The fourth proportional to 68,954,317.65, 103,400,350.67 and 19,758,918.60 is: 29,629,458.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,954,317.65 : 103,400,350.67 = 19,758,918.60 : x
  2. Step 2: Convert to fraction form
    68,954,317.65/103,400,350.67 = 19,758,918.60/x
  3. Step 3: Cross multiply
    68,954,317.65x = 103,400,350.67 × 19,758,918.60
  4. Step 4: Simplify right side
    68,954,317.65x = 2,043,079,112,001,191.25
  5. Step 5: Solve for x
    x = 2,043,079,112,001,191.25/68,954,317.65
  6. Step 6: Final answer
    x = 29,629,458.77

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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.