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Finding the Fourth Proportional to 69,709.79, 104,564.45 and 19,789.91

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Solution

The fourth proportional to 69,709.79, 104,564.45 and 19,789.91 is: 29,684.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,709.79 : 104,564.45 = 19,789.91 : x
  2. Step 2: Convert to fraction form
    69,709.79/104,564.45 = 19,789.91/x
  3. Step 3: Cross multiply
    69,709.79x = 104,564.45 × 19,789.91
  4. Step 4: Simplify right side
    69,709.79x = 2,069,320,432.93
  5. Step 5: Solve for x
    x = 2,069,320,432.93/69,709.79
  6. Step 6: Final answer
    x = 29,684.79

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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.