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Finding the Fourth Proportional to 70,393.56, 105,606.66 and 20,474.84

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Solution

The fourth proportional to 70,393.56, 105,606.66 and 20,474.84 is: 30,717.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,393.56 : 105,606.66 = 20,474.84 : x
  2. Step 2: Convert to fraction form
    70,393.56/105,606.66 = 20,474.84/x
  3. Step 3: Cross multiply
    70,393.56x = 105,606.66 × 20,474.84
  4. Step 4: Simplify right side
    70,393.56x = 2,162,279,466.43
  5. Step 5: Solve for x
    x = 2,162,279,466.43/70,393.56
  6. Step 6: Final answer
    x = 30,717.01

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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.