Home / 129,511.35-194,012.78-115,405.20

Finding the Fourth Proportional to 129,511.35, 194,012.78 and 115,405.20

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Solution

The fourth proportional to 129,511.35, 194,012.78 and 115,405.20 is: 172,881.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,511.35 : 194,012.78 = 115,405.20 : x
  2. Step 2: Convert to fraction form
    129,511.35/194,012.78 = 115,405.20/x
  3. Step 3: Cross multiply
    129,511.35x = 194,012.78 × 115,405.20
  4. Step 4: Simplify right side
    129,511.35x = 22,390,083,101.43
  5. Step 5: Solve for x
    x = 22,390,083,101.43/129,511.35
  6. Step 6: Final answer
    x = 172,881.24

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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.