Home / 128,853.60-193,280.40-120,105.60

Finding the Fourth Proportional to 128,853.60, 193,280.40 and 120,105.60

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Solution

The fourth proportional to 128,853.60, 193,280.40 and 120,105.60 is: 180,158.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,853.60 : 193,280.40 = 120,105.60 : x
  2. Step 2: Convert to fraction form
    128,853.60/193,280.40 = 120,105.60/x
  3. Step 3: Cross multiply
    128,853.60x = 193,280.40 × 120,105.60
  4. Step 4: Simplify right side
    128,853.60x = 23,214,058,410.24
  5. Step 5: Solve for x
    x = 23,214,058,410.24/128,853.60
  6. Step 6: Final answer
    x = 180,158.40

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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.