Home / 122,959.20-184,438.80-85,634.40

Finding the Fourth Proportional to 122,959.20, 184,438.80 and 85,634.40

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Solution

The fourth proportional to 122,959.20, 184,438.80 and 85,634.40 is: 128,451.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,959.20 : 184,438.80 = 85,634.40 : x
  2. Step 2: Convert to fraction form
    122,959.20/184,438.80 = 85,634.40/x
  3. Step 3: Cross multiply
    122,959.20x = 184,438.80 × 85,634.40
  4. Step 4: Simplify right side
    122,959.20x = 15,794,305,974.72
  5. Step 5: Solve for x
    x = 15,794,305,974.72/122,959.20
  6. Step 6: Final answer
    x = 128,451.60

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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.