Home / 212,729.78-319,150.02-79,620.50

Finding the Fourth Proportional to 212,729.78, 319,150.02 and 79,620.50

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Solution

The fourth proportional to 212,729.78, 319,150.02 and 79,620.50 is: 119,451.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,729.78 : 319,150.02 = 79,620.50 : x
  2. Step 2: Convert to fraction form
    212,729.78/319,150.02 = 79,620.50/x
  3. Step 3: Cross multiply
    212,729.78x = 319,150.02 × 79,620.50
  4. Step 4: Simplify right side
    212,729.78x = 25,410,884,167.41
  5. Step 5: Solve for x
    x = 25,410,884,167.41/212,729.78
  6. Step 6: Final answer
    x = 119,451.47

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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.