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Finding the Fourth Proportional to 143,968.95, 198,675.80 and 79,438.77

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Solution

The fourth proportional to 143,968.95, 198,675.80 and 79,438.77 is: 109,624.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,968.95 : 198,675.80 = 79,438.77 : x
  2. Step 2: Convert to fraction form
    143,968.95/198,675.80 = 79,438.77/x
  3. Step 3: Cross multiply
    143,968.95x = 198,675.80 × 79,438.77
  4. Step 4: Simplify right side
    143,968.95x = 15,782,560,783.57
  5. Step 5: Solve for x
    x = 15,782,560,783.57/143,968.95
  6. Step 6: Final answer
    x = 109,624.75

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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.