Home / 78,136.74-117,205.17-21,982.83

Finding the Fourth Proportional to 78,136.74, 117,205.17 and 21,982.83

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Solution

The fourth proportional to 78,136.74, 117,205.17 and 21,982.83 is: 32,974.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,136.74 : 117,205.17 = 21,982.83 : x
  2. Step 2: Convert to fraction form
    78,136.74/117,205.17 = 21,982.83/x
  3. Step 3: Cross multiply
    78,136.74x = 117,205.17 × 21,982.83
  4. Step 4: Simplify right side
    78,136.74x = 2,576,501,327.23
  5. Step 5: Solve for x
    x = 2,576,501,327.23/78,136.74
  6. Step 6: Final answer
    x = 32,974.26

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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.