Home / 128,638.64-192,976.62-39,899.30

Finding the Fourth Proportional to 128,638.64, 192,976.62 and 39,899.30

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Solution

The fourth proportional to 128,638.64, 192,976.62 and 39,899.30 is: 59,854.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,638.64 : 192,976.62 = 39,899.30 : x
  2. Step 2: Convert to fraction form
    128,638.64/192,976.62 = 39,899.30/x
  3. Step 3: Cross multiply
    128,638.64x = 192,976.62 × 39,899.30
  4. Step 4: Simplify right side
    128,638.64x = 7,699,632,054.37
  5. Step 5: Solve for x
    x = 7,699,632,054.37/128,638.64
  6. Step 6: Final answer
    x = 59,854.74

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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.