Home / 70,782.12-106,136.46-20,855.64

Finding the Fourth Proportional to 70,782.12, 106,136.46 and 20,855.64

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Solution

The fourth proportional to 70,782.12, 106,136.46 and 20,855.64 is: 31,272.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,782.12 : 106,136.46 = 20,855.64 : x
  2. Step 2: Convert to fraction form
    70,782.12/106,136.46 = 20,855.64/x
  3. Step 3: Cross multiply
    70,782.12x = 106,136.46 × 20,855.64
  4. Step 4: Simplify right side
    70,782.12x = 2,213,543,800.63
  5. Step 5: Solve for x
    x = 2,213,543,800.63/70,782.12
  6. Step 6: Final answer
    x = 31,272.64

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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.