Home / 212,939.31-319,093.38-86,425.63

Finding the Fourth Proportional to 212,939.31, 319,093.38 and 86,425.63

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Solution

The fourth proportional to 212,939.31, 319,093.38 and 86,425.63 is: 129,510.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,939.31 : 319,093.38 = 86,425.63 : x
  2. Step 2: Convert to fraction form
    212,939.31/319,093.38 = 86,425.63/x
  3. Step 3: Cross multiply
    212,939.31x = 319,093.38 × 86,425.63
  4. Step 4: Simplify right side
    212,939.31x = 27,577,845,434.00
  5. Step 5: Solve for x
    x = 27,577,845,434.00/212,939.31
  6. Step 6: Final answer
    x = 129,510.36

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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.