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Finding the Fourth Proportional to 70,958.43, 97,920.09 and 39,127.05

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Solution

The fourth proportional to 70,958.43, 97,920.09 and 39,127.05 is: 53,993.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,958.43 : 97,920.09 = 39,127.05 : x
  2. Step 2: Convert to fraction form
    70,958.43/97,920.09 = 39,127.05/x
  3. Step 3: Cross multiply
    70,958.43x = 97,920.09 × 39,127.05
  4. Step 4: Simplify right side
    70,958.43x = 3,831,324,257.43
  5. Step 5: Solve for x
    x = 3,831,324,257.43/70,958.43
  6. Step 6: Final answer
    x = 53,993.93

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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.