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Finding the Fourth Proportional to 143,438.98, 197,952.80 and 79,775.41

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Solution

The fourth proportional to 143,438.98, 197,952.80 and 79,775.41 is: 110,093.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,438.98 : 197,952.80 = 79,775.41 : x
  2. Step 2: Convert to fraction form
    143,438.98/197,952.80 = 79,775.41/x
  3. Step 3: Cross multiply
    143,438.98x = 197,952.80 × 79,775.41
  4. Step 4: Simplify right side
    143,438.98x = 15,791,765,780.65
  5. Step 5: Solve for x
    x = 15,791,765,780.65/143,438.98
  6. Step 6: Final answer
    x = 110,093.96

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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.