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Finding the Fourth Proportional to 212,708.62, 319,186.96 and 79,682.32

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Solution

The fourth proportional to 212,708.62, 319,186.96 and 79,682.32 is: 119,569.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,708.62 : 319,186.96 = 79,682.32 : x
  2. Step 2: Convert to fraction form
    212,708.62/319,186.96 = 79,682.32/x
  3. Step 3: Cross multiply
    212,708.62x = 319,186.96 × 79,682.32
  4. Step 4: Simplify right side
    212,708.62x = 25,433,557,486.55
  5. Step 5: Solve for x
    x = 25,433,557,486.55/212,708.62
  6. Step 6: Final answer
    x = 119,569.94

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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.