Home / 207,748.20-311,622.30-128,951.40

Finding the Fourth Proportional to 207,748.20, 311,622.30 and 128,951.40

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Solution

The fourth proportional to 207,748.20, 311,622.30 and 128,951.40 is: 193,427.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,748.20 : 311,622.30 = 128,951.40 : x
  2. Step 2: Convert to fraction form
    207,748.20/311,622.30 = 128,951.40/x
  3. Step 3: Cross multiply
    207,748.20x = 311,622.30 × 128,951.40
  4. Step 4: Simplify right side
    207,748.20x = 40,184,131,856.22
  5. Step 5: Solve for x
    x = 40,184,131,856.22/207,748.20
  6. Step 6: Final answer
    x = 193,427.10

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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.