Home / 76,853.85-115,267.72-20,681.43

Finding the Fourth Proportional to 76,853.85, 115,267.72 and 20,681.43

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Solution

The fourth proportional to 76,853.85, 115,267.72 and 20,681.43 is: 31,018.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,853.85 : 115,267.72 = 20,681.43 : x
  2. Step 2: Convert to fraction form
    76,853.85/115,267.72 = 20,681.43/x
  3. Step 3: Cross multiply
    76,853.85x = 115,267.72 × 20,681.43
  4. Step 4: Simplify right side
    76,853.85x = 2,383,901,282.44
  5. Step 5: Solve for x
    x = 2,383,901,282.44/76,853.85
  6. Step 6: Final answer
    x = 31,018.63

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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.