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Finding the Fourth Proportional to 70,911.81, 106,388.57 and 20,993.24

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Solution

The fourth proportional to 70,911.81, 106,388.57 and 20,993.24 is: 31,496.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,911.81 : 106,388.57 = 20,993.24 : x
  2. Step 2: Convert to fraction form
    70,911.81/106,388.57 = 20,993.24/x
  3. Step 3: Cross multiply
    70,911.81x = 106,388.57 × 20,993.24
  4. Step 4: Simplify right side
    70,911.81x = 2,233,441,101.72
  5. Step 5: Solve for x
    x = 2,233,441,101.72/70,911.81
  6. Step 6: Final answer
    x = 31,496.04

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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.