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Finding the Fourth Proportional to 68,679.30, 94,738.74 and 39,995.58

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Solution

The fourth proportional to 68,679.30, 94,738.74 and 39,995.58 is: 55,171.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,679.30 : 94,738.74 = 39,995.58 : x
  2. Step 2: Convert to fraction form
    68,679.30/94,738.74 = 39,995.58/x
  3. Step 3: Cross multiply
    68,679.30x = 94,738.74 × 39,995.58
  4. Step 4: Simplify right side
    68,679.30x = 3,789,130,854.77
  5. Step 5: Solve for x
    x = 3,789,130,854.77/68,679.30
  6. Step 6: Final answer
    x = 55,171.37

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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.