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Finding the Fourth Proportional to 143,570.61, 198,133.97 and 79,912.44

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Solution

The fourth proportional to 143,570.61, 198,133.97 and 79,912.44 is: 110,282.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,570.61 : 198,133.97 = 79,912.44 : x
  2. Step 2: Convert to fraction form
    143,570.61/198,133.97 = 79,912.44/x
  3. Step 3: Cross multiply
    143,570.61x = 198,133.97 × 79,912.44
  4. Step 4: Simplify right side
    143,570.61x = 15,833,368,590.02
  5. Step 5: Solve for x
    x = 15,833,368,590.02/143,570.61
  6. Step 6: Final answer
    x = 110,282.80

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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.