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Finding the Fourth Proportional to 141,912.63, 212,596.79 and 79,626.87

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Solution

The fourth proportional to 141,912.63, 212,596.79 and 79,626.87 is: 119,287.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,912.63 : 212,596.79 = 79,626.87 : x
  2. Step 2: Convert to fraction form
    141,912.63/212,596.79 = 79,626.87/x
  3. Step 3: Cross multiply
    141,912.63x = 212,596.79 × 79,626.87
  4. Step 4: Simplify right side
    141,912.63x = 16,928,416,561.61
  5. Step 5: Solve for x
    x = 16,928,416,561.61/141,912.63
  6. Step 6: Final answer
    x = 119,287.60

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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.