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Finding the Fourth Proportional to 212,906.03, 319,346.51 and 79,775.15

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Solution

The fourth proportional to 212,906.03, 319,346.51 and 79,775.15 is: 119,658.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,906.03 : 319,346.51 = 79,775.15 : x
  2. Step 2: Convert to fraction form
    212,906.03/319,346.51 = 79,775.15/x
  3. Step 3: Cross multiply
    212,906.03x = 319,346.51 × 79,775.15
  4. Step 4: Simplify right side
    212,906.03x = 25,475,914,339.93
  5. Step 5: Solve for x
    x = 25,475,914,339.93/212,906.03
  6. Step 6: Final answer
    x = 119,658.02

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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.