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Finding the Fourth Proportional to 212,907.03, 319,348.01 and 79,776.15

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Solution

The fourth proportional to 212,907.03, 319,348.01 and 79,776.15 is: 119,659.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,907.03 : 319,348.01 = 79,776.15 : x
  2. Step 2: Convert to fraction form
    212,907.03/319,348.01 = 79,776.15/x
  3. Step 3: Cross multiply
    212,907.03x = 319,348.01 × 79,776.15
  4. Step 4: Simplify right side
    212,907.03x = 25,476,354,747.96
  5. Step 5: Solve for x
    x = 25,476,354,747.96/212,907.03
  6. Step 6: Final answer
    x = 119,659.53

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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.