Home / 207,746.20-311,619.30-128,949.40

Finding the Fourth Proportional to 207,746.20, 311,619.30 and 128,949.40

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Solution

The fourth proportional to 207,746.20, 311,619.30 and 128,949.40 is: 193,424.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,746.20 : 311,619.30 = 128,949.40 : x
  2. Step 2: Convert to fraction form
    207,746.20/311,619.30 = 128,949.40/x
  3. Step 3: Cross multiply
    207,746.20x = 311,619.30 × 128,949.40
  4. Step 4: Simplify right side
    207,746.20x = 40,183,121,763.42
  5. Step 5: Solve for x
    x = 40,183,121,763.42/207,746.20
  6. Step 6: Final answer
    x = 193,424.10

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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.