Home / 128,567.16-177,401.46-80,786.64

Finding the Fourth Proportional to 128,567.16, 177,401.46 and 80,786.64

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Solution

The fourth proportional to 128,567.16, 177,401.46 and 80,786.64 is: 111,472.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,567.16 : 177,401.46 = 80,786.64 : x
  2. Step 2: Convert to fraction form
    128,567.16/177,401.46 = 80,786.64/x
  3. Step 3: Cross multiply
    128,567.16x = 177,401.46 × 80,786.64
  4. Step 4: Simplify right side
    128,567.16x = 14,331,667,884.49
  5. Step 5: Solve for x
    x = 14,331,667,884.49/128,567.16
  6. Step 6: Final answer
    x = 111,472.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.