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Finding the Fourth Proportional to 70,954.83, 106,219.73 and 68,431.39

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Solution

The fourth proportional to 70,954.83, 106,219.73 and 68,431.39 is: 102,442.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,954.83 : 106,219.73 = 68,431.39 : x
  2. Step 2: Convert to fraction form
    70,954.83/106,219.73 = 68,431.39/x
  3. Step 3: Cross multiply
    70,954.83x = 106,219.73 × 68,431.39
  4. Step 4: Simplify right side
    70,954.83x = 7,268,763,769.32
  5. Step 5: Solve for x
    x = 7,268,763,769.32/70,954.83
  6. Step 6: Final answer
    x = 102,442.13

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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.