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Finding the Fourth Proportional to 69,781.20, 104,670.96 and 17,191.20

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Solution

The fourth proportional to 69,781.20, 104,670.96 and 17,191.20 is: 25,786.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,781.20 : 104,670.96 = 17,191.20 : x
  2. Step 2: Convert to fraction form
    69,781.20/104,670.96 = 17,191.20/x
  3. Step 3: Cross multiply
    69,781.20x = 104,670.96 × 17,191.20
  4. Step 4: Simplify right side
    69,781.20x = 1,799,419,407.55
  5. Step 5: Solve for x
    x = 1,799,419,407.55/69,781.20
  6. Step 6: Final answer
    x = 25,786.59

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1.5x scale

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.