Home / 128,330.46-192,513.78-39,591.18

Finding the Fourth Proportional to 128,330.46, 192,513.78 and 39,591.18

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Solution

The fourth proportional to 128,330.46, 192,513.78 and 39,591.18 is: 59,392.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,330.46 : 192,513.78 = 39,591.18 : x
  2. Step 2: Convert to fraction form
    128,330.46/192,513.78 = 39,591.18/x
  3. Step 3: Cross multiply
    128,330.46x = 192,513.78 × 39,591.18
  4. Step 4: Simplify right side
    128,330.46x = 7,621,847,716.46
  5. Step 5: Solve for x
    x = 7,621,847,716.46/128,330.46
  6. Step 6: Final answer
    x = 59,392.35

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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.