Home / 52,136.40-78,190.20-20,974.80

Finding the Fourth Proportional to 52,136.40, 78,190.20 and 20,974.80

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Solution

The fourth proportional to 52,136.40, 78,190.20 and 20,974.80 is: 31,456.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,136.40 : 78,190.20 = 20,974.80 : x
  2. Step 2: Convert to fraction form
    52,136.40/78,190.20 = 20,974.80/x
  3. Step 3: Cross multiply
    52,136.40x = 78,190.20 × 20,974.80
  4. Step 4: Simplify right side
    52,136.40x = 1,640,023,806.96
  5. Step 5: Solve for x
    x = 1,640,023,806.96/52,136.40
  6. Step 6: Final answer
    x = 31,456.41

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1.5x scale

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.