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Finding the Fourth Proportional to 70,872.36, 106,327.90 and 20,954.92

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Solution

The fourth proportional to 70,872.36, 106,327.90 and 20,954.92 is: 31,438.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,872.36 : 106,327.90 = 20,954.92 : x
  2. Step 2: Convert to fraction form
    70,872.36/106,327.90 = 20,954.92/x
  3. Step 3: Cross multiply
    70,872.36x = 106,327.90 × 20,954.92
  4. Step 4: Simplify right side
    70,872.36x = 2,228,092,638.27
  5. Step 5: Solve for x
    x = 2,228,092,638.27/70,872.36
  6. Step 6: Final answer
    x = 31,438.10

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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.