Home / 189,173.68-260,912-121,196.95

Finding the Fourth Proportional to 189,173.68, 260,912 and 121,196.95

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Solution

The fourth proportional to 189,173.68, 260,912 and 121,196.95 is: 167,157.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,173.68 : 260,912 = 121,196.95 : x
  2. Step 2: Convert to fraction form
    189,173.68/260,912 = 121,196.95/x
  3. Step 3: Cross multiply
    189,173.68x = 260,912 × 121,196.95
  4. Step 4: Simplify right side
    189,173.68x = 31,621,738,618.40
  5. Step 5: Solve for x
    x = 31,621,738,618.40/189,173.68
  6. Step 6: Final answer
    x = 167,157.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.