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Finding the Fourth Proportional to 128,660.64, 192,863.25 and 61,074.24

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Solution

The fourth proportional to 128,660.64, 192,863.25 and 61,074.24 is: 91,550.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,660.64 : 192,863.25 = 61,074.24 : x
  2. Step 2: Convert to fraction form
    128,660.64/192,863.25 = 61,074.24/x
  3. Step 3: Cross multiply
    128,660.64x = 192,863.25 × 61,074.24
  4. Step 4: Simplify right side
    128,660.64x = 11,778,976,417.68
  5. Step 5: Solve for x
    x = 11,778,976,417.68/128,660.64
  6. Step 6: Final answer
    x = 91,550.74

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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.