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Finding the Fourth Proportional to 143,951.42, 198,653.70 and 79,422.90

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Solution

The fourth proportional to 143,951.42, 198,653.70 and 79,422.90 is: 109,604.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,951.42 : 198,653.70 = 79,422.90 : x
  2. Step 2: Convert to fraction form
    143,951.42/198,653.70 = 79,422.90/x
  3. Step 3: Cross multiply
    143,951.42x = 198,653.70 × 79,422.90
  4. Step 4: Simplify right side
    143,951.42x = 15,777,652,949.73
  5. Step 5: Solve for x
    x = 15,777,652,949.73/143,951.42
  6. Step 6: Final answer
    x = 109,604.01

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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.