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Finding the Fourth Proportional to 69,380.80, 104,040.42 and 31,931.80

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Solution

The fourth proportional to 69,380.80, 104,040.42 and 31,931.80 is: 47,883.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,380.80 : 104,040.42 = 31,931.80 : x
  2. Step 2: Convert to fraction form
    69,380.80/104,040.42 = 31,931.80/x
  3. Step 3: Cross multiply
    69,380.80x = 104,040.42 × 31,931.80
  4. Step 4: Simplify right side
    69,380.80x = 3,322,197,883.36
  5. Step 5: Solve for x
    x = 3,322,197,883.36/69,380.80
  6. Step 6: Final answer
    x = 47,883.53

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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.