Home / 78,255.30-117,384.97-21,329.67

Finding the Fourth Proportional to 78,255.30, 117,384.97 and 21,329.67

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Solution

The fourth proportional to 78,255.30, 117,384.97 and 21,329.67 is: 31,995.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,255.30 : 117,384.97 = 21,329.67 : x
  2. Step 2: Convert to fraction form
    78,255.30/117,384.97 = 21,329.67/x
  3. Step 3: Cross multiply
    78,255.30x = 117,384.97 × 21,329.67
  4. Step 4: Simplify right side
    78,255.30x = 2,503,782,379.64
  5. Step 5: Solve for x
    x = 2,503,782,379.64/78,255.30
  6. Step 6: Final answer
    x = 31,995.05

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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.