Home / 70,149.37-105,239.60-20,225.57

Finding the Fourth Proportional to 70,149.37, 105,239.60 and 20,225.57

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Solution

The fourth proportional to 70,149.37, 105,239.60 and 20,225.57 is: 30,342.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,149.37 : 105,239.60 = 20,225.57 : x
  2. Step 2: Convert to fraction form
    70,149.37/105,239.60 = 20,225.57/x
  3. Step 3: Cross multiply
    70,149.37x = 105,239.60 × 20,225.57
  4. Step 4: Simplify right side
    70,149.37x = 2,128,530,896.57
  5. Step 5: Solve for x
    x = 2,128,530,896.57/70,149.37
  6. Step 6: Final answer
    x = 30,342.84

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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.