Home / 85,975.38-128,986.92-36,043.74

Finding the Fourth Proportional to 85,975.38, 128,986.92 and 36,043.74

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Solution

The fourth proportional to 85,975.38, 128,986.92 and 36,043.74 is: 54,075.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,975.38 : 128,986.92 = 36,043.74 : x
  2. Step 2: Convert to fraction form
    85,975.38/128,986.92 = 36,043.74/x
  3. Step 3: Cross multiply
    85,975.38x = 128,986.92 × 36,043.74
  4. Step 4: Simplify right side
    85,975.38x = 4,649,171,007.88
  5. Step 5: Solve for x
    x = 4,649,171,007.88/85,975.38
  6. Step 6: Final answer
    x = 54,075.61

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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.