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Finding the Fourth Proportional to 143,785.51, 198,435.44 and 79,266.22

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Solution

The fourth proportional to 143,785.51, 198,435.44 and 79,266.22 is: 109,393.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,785.51 : 198,435.44 = 79,266.22 : x
  2. Step 2: Convert to fraction form
    143,785.51/198,435.44 = 79,266.22/x
  3. Step 3: Cross multiply
    143,785.51x = 198,435.44 × 79,266.22
  4. Step 4: Simplify right side
    143,785.51x = 15,729,226,944.91
  5. Step 5: Solve for x
    x = 15,729,226,944.91/143,785.51
  6. Step 6: Final answer
    x = 109,393.69

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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.