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Finding the Fourth Proportional to 86,903.87, 119,865.37 and 79,756.81

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Solution

The fourth proportional to 86,903.87, 119,865.37 and 79,756.81 is: 110,007.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,903.87 : 119,865.37 = 79,756.81 : x
  2. Step 2: Convert to fraction form
    86,903.87/119,865.37 = 79,756.81/x
  3. Step 3: Cross multiply
    86,903.87x = 119,865.37 × 79,756.81
  4. Step 4: Simplify right side
    86,903.87x = 9,560,079,540.67
  5. Step 5: Solve for x
    x = 9,560,079,540.67/86,903.87
  6. Step 6: Final answer
    x = 110,007.53

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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.