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Finding the Fourth Proportional to 81,474.80, 112,410.46 and 51,290.25

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Solution

The fourth proportional to 81,474.80, 112,410.46 and 51,290.25 is: 70,764.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,474.80 : 112,410.46 = 51,290.25 : x
  2. Step 2: Convert to fraction form
    81,474.80/112,410.46 = 51,290.25/x
  3. Step 3: Cross multiply
    81,474.80x = 112,410.46 × 51,290.25
  4. Step 4: Simplify right side
    81,474.80x = 5,765,560,033.96
  5. Step 5: Solve for x
    x = 5,765,560,033.96/81,474.80
  6. Step 6: Final answer
    x = 70,764.95

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1.5x scale

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.