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Finding the Fourth Proportional to 69,842.93, 104,780.66 and 19,923.71

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Solution

The fourth proportional to 69,842.93, 104,780.66 and 19,923.71 is: 29,890.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,842.93 : 104,780.66 = 19,923.71 : x
  2. Step 2: Convert to fraction form
    69,842.93/104,780.66 = 19,923.71/x
  3. Step 3: Cross multiply
    69,842.93x = 104,780.66 × 19,923.71
  4. Step 4: Simplify right side
    69,842.93x = 2,087,618,859.93
  5. Step 5: Solve for x
    x = 2,087,618,859.93/69,842.93
  6. Step 6: Final answer
    x = 29,890.20

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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.