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Finding the Fourth Proportional to 143,438.48, 197,952.11 and 79,774.91

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Solution

The fourth proportional to 143,438.48, 197,952.11 and 79,774.91 is: 110,093.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,438.48 : 197,952.11 = 79,774.91 : x
  2. Step 2: Convert to fraction form
    143,438.48/197,952.11 = 79,774.91/x
  3. Step 3: Cross multiply
    143,438.48x = 197,952.11 × 79,774.91
  4. Step 4: Simplify right side
    143,438.48x = 15,791,611,759.56
  5. Step 5: Solve for x
    x = 15,791,611,759.56/143,438.48
  6. Step 6: Final answer
    x = 110,093.27

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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.