Home / 129,778.20-194,667.30-128,903.40

Finding the Fourth Proportional to 129,778.20, 194,667.30 and 128,903.40

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Solution

The fourth proportional to 129,778.20, 194,667.30 and 128,903.40 is: 193,355.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,778.20 : 194,667.30 = 128,903.40 : x
  2. Step 2: Convert to fraction form
    129,778.20/194,667.30 = 128,903.40/x
  3. Step 3: Cross multiply
    129,778.20x = 194,667.30 × 128,903.40
  4. Step 4: Simplify right side
    129,778.20x = 25,093,276,838.82
  5. Step 5: Solve for x
    x = 25,093,276,838.82/129,778.20
  6. Step 6: Final answer
    x = 193,355.10

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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.