Home / 212,845.51-319,052.67-138,013.12

Finding the Fourth Proportional to 212,845.51, 319,052.67 and 138,013.12

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Solution

The fourth proportional to 212,845.51, 319,052.67 and 138,013.12 is: 206,879.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,845.51 : 319,052.67 = 138,013.12 : x
  2. Step 2: Convert to fraction form
    212,845.51/319,052.67 = 138,013.12/x
  3. Step 3: Cross multiply
    212,845.51x = 319,052.67 × 138,013.12
  4. Step 4: Simplify right side
    212,845.51x = 44,033,454,431.03
  5. Step 5: Solve for x
    x = 44,033,454,431.03/212,845.51
  6. Step 6: Final answer
    x = 206,879.88

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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.