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Finding the Fourth Proportional to 69,339.17, 103,992.69 and 19,422.79

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Solution

The fourth proportional to 69,339.17, 103,992.69 and 19,422.79 is: 29,129.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,339.17 : 103,992.69 = 19,422.79 : x
  2. Step 2: Convert to fraction form
    69,339.17/103,992.69 = 19,422.79/x
  3. Step 3: Cross multiply
    69,339.17x = 103,992.69 × 19,422.79
  4. Step 4: Simplify right side
    69,339.17x = 2,019,828,179.41
  5. Step 5: Solve for x
    x = 2,019,828,179.41/69,339.17
  6. Step 6: Final answer
    x = 29,129.68

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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.