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Finding the Fourth Proportional to 122,728.80, 184,093.20 and 109,509.60

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Solution

The fourth proportional to 122,728.80, 184,093.20 and 109,509.60 is: 164,264.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,728.80 : 184,093.20 = 109,509.60 : x
  2. Step 2: Convert to fraction form
    122,728.80/184,093.20 = 109,509.60/x
  3. Step 3: Cross multiply
    122,728.80x = 184,093.20 × 109,509.60
  4. Step 4: Simplify right side
    122,728.80x = 20,159,972,694.72
  5. Step 5: Solve for x
    x = 20,159,972,694.72/122,728.80
  6. Step 6: Final answer
    x = 164,264.40

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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.