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Finding the Fourth Proportional to 71,782.64, 107,673.97 and 19,190.76

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Solution

The fourth proportional to 71,782.64, 107,673.97 and 19,190.76 is: 28,786.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,782.64 : 107,673.97 = 19,190.76 : x
  2. Step 2: Convert to fraction form
    71,782.64/107,673.97 = 19,190.76/x
  3. Step 3: Cross multiply
    71,782.64x = 107,673.97 × 19,190.76
  4. Step 4: Simplify right side
    71,782.64x = 2,066,345,316.52
  5. Step 5: Solve for x
    x = 2,066,345,316.52/71,782.64
  6. Step 6: Final answer
    x = 28,786.14

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Similar ratio
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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.