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Finding the Fourth Proportional to 70,859.67, 97,790.78 and 39,028.56

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Solution

The fourth proportional to 70,859.67, 97,790.78 and 39,028.56 is: 53,861.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,859.67 : 97,790.78 = 39,028.56 : x
  2. Step 2: Convert to fraction form
    70,859.67/97,790.78 = 39,028.56/x
  3. Step 3: Cross multiply
    70,859.67x = 97,790.78 × 39,028.56
  4. Step 4: Simplify right side
    70,859.67x = 3,816,633,324.68
  5. Step 5: Solve for x
    x = 3,816,633,324.68/70,859.67
  6. Step 6: Final answer
    x = 53,861.86

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1.5x scale

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.