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Finding the Fourth Proportional to 212,758.92, 319,146.48 and 79,625.16

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Solution

The fourth proportional to 212,758.92, 319,146.48 and 79,625.16 is: 119,440.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,758.92 : 319,146.48 = 79,625.16 : x
  2. Step 2: Convert to fraction form
    212,758.92/319,146.48 = 79,625.16/x
  3. Step 3: Cross multiply
    212,758.92x = 319,146.48 × 79,625.16
  4. Step 4: Simplify right side
    212,758.92x = 25,412,089,533.44
  5. Step 5: Solve for x
    x = 25,412,089,533.44/212,758.92
  6. Step 6: Final answer
    x = 119,440.77

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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.