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Finding the Fourth Proportional to 66,974.80, 100,577.40 and 47,390.80

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Solution

The fourth proportional to 66,974.80, 100,577.40 and 47,390.80 is: 71,167.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,974.80 : 100,577.40 = 47,390.80 : x
  2. Step 2: Convert to fraction form
    66,974.80/100,577.40 = 47,390.80/x
  3. Step 3: Cross multiply
    66,974.80x = 100,577.40 × 47,390.80
  4. Step 4: Simplify right side
    66,974.80x = 4,766,443,447.92
  5. Step 5: Solve for x
    x = 4,766,443,447.92/66,974.80
  6. Step 6: Final answer
    x = 71,167.71

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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.