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Finding the Fourth Proportional to 45,383.91, 68,079.12 and 12,103.80

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Solution

The fourth proportional to 45,383.91, 68,079.12 and 12,103.80 is: 18,156.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,383.91 : 68,079.12 = 12,103.80 : x
  2. Step 2: Convert to fraction form
    45,383.91/68,079.12 = 12,103.80/x
  3. Step 3: Cross multiply
    45,383.91x = 68,079.12 × 12,103.80
  4. Step 4: Simplify right side
    45,383.91x = 824,016,052.66
  5. Step 5: Solve for x
    x = 824,016,052.66/45,383.91
  6. Step 6: Final answer
    x = 18,156.57

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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.