Home / 213,020.10-319,408.65-79,904.70

Finding the Fourth Proportional to 213,020.10, 319,408.65 and 79,904.70

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Solution

The fourth proportional to 213,020.10, 319,408.65 and 79,904.70 is: 119,811.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,020.10 : 319,408.65 = 79,904.70 : x
  2. Step 2: Convert to fraction form
    213,020.10/319,408.65 = 79,904.70/x
  3. Step 3: Cross multiply
    213,020.10x = 319,408.65 × 79,904.70
  4. Step 4: Simplify right side
    213,020.10x = 25,522,252,355.66
  5. Step 5: Solve for x
    x = 25,522,252,355.66/213,020.10
  6. Step 6: Final answer
    x = 119,811.47

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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.