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Finding the Fourth Proportional to 68,918.79, 103,418.81 and 28,944.79

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Solution

The fourth proportional to 68,918.79, 103,418.81 and 28,944.79 is: 43,434.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,918.79 : 103,418.81 = 28,944.79 : x
  2. Step 2: Convert to fraction form
    68,918.79/103,418.81 = 28,944.79/x
  3. Step 3: Cross multiply
    68,918.79x = 103,418.81 × 28,944.79
  4. Step 4: Simplify right side
    68,918.79x = 2,993,435,442.77
  5. Step 5: Solve for x
    x = 2,993,435,442.77/68,918.79
  6. Step 6: Final answer
    x = 43,434.24

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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.