Home / 128,727.60-193,091.40-106,420.20

Finding the Fourth Proportional to 128,727.60, 193,091.40 and 106,420.20

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Solution

The fourth proportional to 128,727.60, 193,091.40 and 106,420.20 is: 159,630.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,727.60 : 193,091.40 = 106,420.20 : x
  2. Step 2: Convert to fraction form
    128,727.60/193,091.40 = 106,420.20/x
  3. Step 3: Cross multiply
    128,727.60x = 193,091.40 × 106,420.20
  4. Step 4: Simplify right side
    128,727.60x = 20,548,825,406.28
  5. Step 5: Solve for x
    x = 20,548,825,406.28/128,727.60
  6. Step 6: Final answer
    x = 159,630.30

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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.