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Finding the Fourth Proportional to 70,679.66, 106,014.30 and 20,763.66

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Solution

The fourth proportional to 70,679.66, 106,014.30 and 20,763.66 is: 31,143.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,679.66 : 106,014.30 = 20,763.66 : x
  2. Step 2: Convert to fraction form
    70,679.66/106,014.30 = 20,763.66/x
  3. Step 3: Cross multiply
    70,679.66x = 106,014.30 × 20,763.66
  4. Step 4: Simplify right side
    70,679.66x = 2,201,244,880.34
  5. Step 5: Solve for x
    x = 2,201,244,880.34/70,679.66
  6. Step 6: Final answer
    x = 31,143.97

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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.