Home / 212,715.12-319,196.70-79,688.82

Finding the Fourth Proportional to 212,715.12, 319,196.70 and 79,688.82

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Solution

The fourth proportional to 212,715.12, 319,196.70 and 79,688.82 is: 119,579.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,715.12 : 319,196.70 = 79,688.82 : x
  2. Step 2: Convert to fraction form
    212,715.12/319,196.70 = 79,688.82/x
  3. Step 3: Cross multiply
    212,715.12x = 319,196.70 × 79,688.82
  4. Step 4: Simplify right side
    212,715.12x = 25,436,408,370.89
  5. Step 5: Solve for x
    x = 25,436,408,370.89/212,715.12
  6. Step 6: Final answer
    x = 119,579.69

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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.