Home / 212,719.78-319,135.02-79,610.50

Finding the Fourth Proportional to 212,719.78, 319,135.02 and 79,610.50

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Solution

The fourth proportional to 212,719.78, 319,135.02 and 79,610.50 is: 119,436.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,719.78 : 319,135.02 = 79,610.50 : x
  2. Step 2: Convert to fraction form
    212,719.78/319,135.02 = 79,610.50/x
  3. Step 3: Cross multiply
    212,719.78x = 319,135.02 × 79,610.50
  4. Step 4: Simplify right side
    212,719.78x = 25,406,498,509.71
  5. Step 5: Solve for x
    x = 25,406,498,509.71/212,719.78
  6. Step 6: Final answer
    x = 119,436.46

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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.