Home / 212,961.13-319,348.13-79,747.95

Finding the Fourth Proportional to 212,961.13, 319,348.13 and 79,747.95

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Solution

The fourth proportional to 212,961.13, 319,348.13 and 79,747.95 is: 119,586.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,961.13 : 319,348.13 = 79,747.95 : x
  2. Step 2: Convert to fraction form
    212,961.13/319,348.13 = 79,747.95/x
  3. Step 3: Cross multiply
    212,961.13x = 319,348.13 × 79,747.95
  4. Step 4: Simplify right side
    212,961.13x = 25,467,358,703.83
  5. Step 5: Solve for x
    x = 25,467,358,703.83/212,961.13
  6. Step 6: Final answer
    x = 119,586.89

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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.