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Finding the Fourth Proportional to 80,012.78, 110,419.80 and 47,766.11

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Solution

The fourth proportional to 80,012.78, 110,419.80 and 47,766.11 is: 65,918.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,012.78 : 110,419.80 = 47,766.11 : x
  2. Step 2: Convert to fraction form
    80,012.78/110,419.80 = 47,766.11/x
  3. Step 3: Cross multiply
    80,012.78x = 110,419.80 × 47,766.11
  4. Step 4: Simplify right side
    80,012.78x = 5,274,323,760.88
  5. Step 5: Solve for x
    x = 5,274,323,760.88/80,012.78
  6. Step 6: Final answer
    x = 65,918.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.