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Finding the Fourth Proportional to 69,780.26, 104,670.80 and 17,189.39

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Solution

The fourth proportional to 69,780.26, 104,670.80 and 17,189.39 is: 25,784.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,780.26 : 104,670.80 = 17,189.39 : x
  2. Step 2: Convert to fraction form
    69,780.26/104,670.80 = 17,189.39/x
  3. Step 3: Cross multiply
    69,780.26x = 104,670.80 × 17,189.39
  4. Step 4: Simplify right side
    69,780.26x = 1,799,227,202.81
  5. Step 5: Solve for x
    x = 1,799,227,202.81/69,780.26
  6. Step 6: Final answer
    x = 25,784.19

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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.