Home / 122,961.20-184,441.80-85,636.40

Finding the Fourth Proportional to 122,961.20, 184,441.80 and 85,636.40

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Solution

The fourth proportional to 122,961.20, 184,441.80 and 85,636.40 is: 128,454.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,961.20 : 184,441.80 = 85,636.40 : x
  2. Step 2: Convert to fraction form
    122,961.20/184,441.80 = 85,636.40/x
  3. Step 3: Cross multiply
    122,961.20x = 184,441.80 × 85,636.40
  4. Step 4: Simplify right side
    122,961.20x = 15,794,931,761.52
  5. Step 5: Solve for x
    x = 15,794,931,761.52/122,961.20
  6. Step 6: Final answer
    x = 128,454.60

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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.