Home / 78,081.89-117,144.69-31,367.57

Finding the Fourth Proportional to 78,081.89, 117,144.69 and 31,367.57

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Solution

The fourth proportional to 78,081.89, 117,144.69 and 31,367.57 is: 47,060.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,081.89 : 117,144.69 = 31,367.57 : x
  2. Step 2: Convert to fraction form
    78,081.89/117,144.69 = 31,367.57/x
  3. Step 3: Cross multiply
    78,081.89x = 117,144.69 × 31,367.57
  4. Step 4: Simplify right side
    78,081.89x = 3,674,543,677.98
  5. Step 5: Solve for x
    x = 3,674,543,677.98/78,081.89
  6. Step 6: Final answer
    x = 47,060.13

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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.