Home / 78,586.32-117,876.30-19,420.44

Finding the Fourth Proportional to 78,586.32, 117,876.30 and 19,420.44

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Solution

The fourth proportional to 78,586.32, 117,876.30 and 19,420.44 is: 29,129.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,586.32 : 117,876.30 = 19,420.44 : x
  2. Step 2: Convert to fraction form
    78,586.32/117,876.30 = 19,420.44/x
  3. Step 3: Cross multiply
    78,586.32x = 117,876.30 × 19,420.44
  4. Step 4: Simplify right side
    78,586.32x = 2,289,209,611.57
  5. Step 5: Solve for x
    x = 2,289,209,611.57/78,586.32
  6. Step 6: Final answer
    x = 29,129.87

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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.