Home / 200,021.85-275,900.08-128,288.25

Finding the Fourth Proportional to 200,021.85, 275,900.08 and 128,288.25

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Solution

The fourth proportional to 200,021.85, 275,900.08 and 128,288.25 is: 176,954.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,021.85 : 275,900.08 = 128,288.25 : x
  2. Step 2: Convert to fraction form
    200,021.85/275,900.08 = 128,288.25/x
  3. Step 3: Cross multiply
    200,021.85x = 275,900.08 × 128,288.25
  4. Step 4: Simplify right side
    200,021.85x = 35,394,738,438.06
  5. Step 5: Solve for x
    x = 35,394,738,438.06/200,021.85
  6. Step 6: Final answer
    x = 176,954.36

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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.