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Finding the Fourth Proportional to 69,228.36, 103,844.88 and 19,309.68

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Solution

The fourth proportional to 69,228.36, 103,844.88 and 19,309.68 is: 28,965.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,228.36 : 103,844.88 = 19,309.68 : x
  2. Step 2: Convert to fraction form
    69,228.36/103,844.88 = 19,309.68/x
  3. Step 3: Cross multiply
    69,228.36x = 103,844.88 × 19,309.68
  4. Step 4: Simplify right side
    69,228.36x = 2,005,211,402.44
  5. Step 5: Solve for x
    x = 2,005,211,402.44/69,228.36
  6. Step 6: Final answer
    x = 28,965.17

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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.