Home / 212,780.70-319,149.45-72,537.30

Finding the Fourth Proportional to 212,780.70, 319,149.45 and 72,537.30

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Solution

The fourth proportional to 212,780.70, 319,149.45 and 72,537.30 is: 108,798.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,780.70 : 319,149.45 = 72,537.30 : x
  2. Step 2: Convert to fraction form
    212,780.70/319,149.45 = 72,537.30/x
  3. Step 3: Cross multiply
    212,780.70x = 319,149.45 × 72,537.30
  4. Step 4: Simplify right side
    212,780.70x = 23,150,239,399.49
  5. Step 5: Solve for x
    x = 23,150,239,399.49/212,780.70
  6. Step 6: Final answer
    x = 108,798.59

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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.