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Finding the Fourth Proportional to 70,992.74, 97,965.54 and 39,161.60

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Solution

The fourth proportional to 70,992.74, 97,965.54 and 39,161.60 is: 54,040.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,992.74 : 97,965.54 = 39,161.60 : x
  2. Step 2: Convert to fraction form
    70,992.74/97,965.54 = 39,161.60/x
  3. Step 3: Cross multiply
    70,992.74x = 97,965.54 × 39,161.60
  4. Step 4: Simplify right side
    70,992.74x = 3,836,487,291.26
  5. Step 5: Solve for x
    x = 3,836,487,291.26/70,992.74
  6. Step 6: Final answer
    x = 54,040.56

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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.