Home / 212,814.51-319,315.80-111,588.39

Finding the Fourth Proportional to 212,814.51, 319,315.80 and 111,588.39

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Solution

The fourth proportional to 212,814.51, 319,315.80 and 111,588.39 is: 167,431.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,814.51 : 319,315.80 = 111,588.39 : x
  2. Step 2: Convert to fraction form
    212,814.51/319,315.80 = 111,588.39/x
  3. Step 3: Cross multiply
    212,814.51x = 319,315.80 × 111,588.39
  4. Step 4: Simplify right side
    212,814.51x = 35,631,936,023.56
  5. Step 5: Solve for x
    x = 35,631,936,023.56/212,814.51
  6. Step 6: Final answer
    x = 167,431.89

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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.