Home / 207,741.20-311,611.80-128,944.40

Finding the Fourth Proportional to 207,741.20, 311,611.80 and 128,944.40

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Solution

The fourth proportional to 207,741.20, 311,611.80 and 128,944.40 is: 193,416.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,741.20 : 311,611.80 = 128,944.40 : x
  2. Step 2: Convert to fraction form
    207,741.20/311,611.80 = 128,944.40/x
  3. Step 3: Cross multiply
    207,741.20x = 311,611.80 × 128,944.40
  4. Step 4: Simplify right side
    207,741.20x = 40,180,596,583.92
  5. Step 5: Solve for x
    x = 40,180,596,583.92/207,741.20
  6. Step 6: Final answer
    x = 193,416.60

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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.