Home / 212,718.78-319,133.52-79,609.50

Finding the Fourth Proportional to 212,718.78, 319,133.52 and 79,609.50

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Solution

The fourth proportional to 212,718.78, 319,133.52 and 79,609.50 is: 119,434.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,718.78 : 319,133.52 = 79,609.50 : x
  2. Step 2: Convert to fraction form
    212,718.78/319,133.52 = 79,609.50/x
  3. Step 3: Cross multiply
    212,718.78x = 319,133.52 × 79,609.50
  4. Step 4: Simplify right side
    212,718.78x = 25,406,059,960.44
  5. Step 5: Solve for x
    x = 25,406,059,960.44/212,718.78
  6. Step 6: Final answer
    x = 119,434.96

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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.