Home / 78,623.56-117,812.27-31,213.05

Finding the Fourth Proportional to 78,623.56, 117,812.27 and 31,213.05

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Solution

The fourth proportional to 78,623.56, 117,812.27 and 31,213.05 is: 46,770.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,623.56 : 117,812.27 = 31,213.05 : x
  2. Step 2: Convert to fraction form
    78,623.56/117,812.27 = 31,213.05/x
  3. Step 3: Cross multiply
    78,623.56x = 117,812.27 × 31,213.05
  4. Step 4: Simplify right side
    78,623.56x = 3,677,279,910.36
  5. Step 5: Solve for x
    x = 3,677,279,910.36/78,623.56
  6. Step 6: Final answer
    x = 46,770.71

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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.