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Finding the Fourth Proportional to 70,910.81, 97,858.97 and 39,081.76

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Solution

The fourth proportional to 70,910.81, 97,858.97 and 39,081.76 is: 53,933.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,910.81 : 97,858.97 = 39,081.76 : x
  2. Step 2: Convert to fraction form
    70,910.81/97,858.97 = 39,081.76/x
  3. Step 3: Cross multiply
    70,910.81x = 97,858.97 × 39,081.76
  4. Step 4: Simplify right side
    70,910.81x = 3,824,500,583.98
  5. Step 5: Solve for x
    x = 3,824,500,583.98/70,910.81
  6. Step 6: Final answer
    x = 53,933.96

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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.