Home / 85,907.36-128,817.30-33,331.88

Finding the Fourth Proportional to 85,907.36, 128,817.30 and 33,331.88

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Solution

The fourth proportional to 85,907.36, 128,817.30 and 33,331.88 is: 49,980.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,907.36 : 128,817.30 = 33,331.88 : x
  2. Step 2: Convert to fraction form
    85,907.36/128,817.30 = 33,331.88/x
  3. Step 3: Cross multiply
    85,907.36x = 128,817.30 × 33,331.88
  4. Step 4: Simplify right side
    85,907.36x = 4,293,722,785.52
  5. Step 5: Solve for x
    x = 4,293,722,785.52/85,907.36
  6. Step 6: Final answer
    x = 49,980.85

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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.