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Finding the Fourth Proportional to 128,366.93, 192,489.63 and 75,074.33

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Solution

The fourth proportional to 128,366.93, 192,489.63 and 75,074.33 is: 112,575.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,366.93 : 192,489.63 = 75,074.33 : x
  2. Step 2: Convert to fraction form
    128,366.93/192,489.63 = 75,074.33/x
  3. Step 3: Cross multiply
    128,366.93x = 192,489.63 × 75,074.33
  4. Step 4: Simplify right side
    128,366.93x = 14,451,029,041.75
  5. Step 5: Solve for x
    x = 14,451,029,041.75/128,366.93
  6. Step 6: Final answer
    x = 112,575.95

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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.