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Finding the Fourth Proportional to 212,976.12, 293,941.26 and 126,939

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Solution

The fourth proportional to 212,976.12, 293,941.26 and 126,939 is: 175,196.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,976.12 : 293,941.26 = 126,939 : x
  2. Step 2: Convert to fraction form
    212,976.12/293,941.26 = 126,939/x
  3. Step 3: Cross multiply
    212,976.12x = 293,941.26 × 126,939
  4. Step 4: Simplify right side
    212,976.12x = 37,312,609,603.14
  5. Step 5: Solve for x
    x = 37,312,609,603.14/212,976.12
  6. Step 6: Final answer
    x = 175,196.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.