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Finding the Fourth Proportional to 103,611.87, 155,212.03 and 79,836.93

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Solution

The fourth proportional to 103,611.87, 155,212.03 and 79,836.93 is: 119,596.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,611.87 : 155,212.03 = 79,836.93 : x
  2. Step 2: Convert to fraction form
    103,611.87/155,212.03 = 79,836.93/x
  3. Step 3: Cross multiply
    103,611.87x = 155,212.03 × 79,836.93
  4. Step 4: Simplify right side
    103,611.87x = 12,391,651,974.27
  5. Step 5: Solve for x
    x = 12,391,651,974.27/103,611.87
  6. Step 6: Final answer
    x = 119,596.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.