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Finding the Fourth Proportional to 68,238.76, 94,170.16 and 39,945.04

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Solution

The fourth proportional to 68,238.76, 94,170.16 and 39,945.04 is: 55,124.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,238.76 : 94,170.16 = 39,945.04 : x
  2. Step 2: Convert to fraction form
    68,238.76/94,170.16 = 39,945.04/x
  3. Step 3: Cross multiply
    68,238.76x = 94,170.16 × 39,945.04
  4. Step 4: Simplify right side
    68,238.76x = 3,761,630,808.01
  5. Step 5: Solve for x
    x = 3,761,630,808.01/68,238.76
  6. Step 6: Final answer
    x = 55,124.55

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Double scale
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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.