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Finding the Fourth Proportional to 69,974.64, 96,488.78 and 47,274.21

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Solution

The fourth proportional to 69,974.64, 96,488.78 and 47,274.21 is: 65,186.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,974.64 : 96,488.78 = 47,274.21 : x
  2. Step 2: Convert to fraction form
    69,974.64/96,488.78 = 47,274.21/x
  3. Step 3: Cross multiply
    69,974.64x = 96,488.78 × 47,274.21
  4. Step 4: Simplify right side
    69,974.64x = 4,561,430,611.99
  5. Step 5: Solve for x
    x = 4,561,430,611.99/69,974.64
  6. Step 6: Final answer
    x = 65,186.91

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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.