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Finding the Fourth Proportional to 143,322.68, 197,791.44 and 79,661

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Solution

The fourth proportional to 143,322.68, 197,791.44 and 79,661 is: 109,935.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,322.68 : 197,791.44 = 79,661 : x
  2. Step 2: Convert to fraction form
    143,322.68/197,791.44 = 79,661/x
  3. Step 3: Cross multiply
    143,322.68x = 197,791.44 × 79,661
  4. Step 4: Simplify right side
    143,322.68x = 15,756,263,901.84
  5. Step 5: Solve for x
    x = 15,756,263,901.84/143,322.68
  6. Step 6: Final answer
    x = 109,935.59

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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.