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Finding the Fourth Proportional to 45,940.93, 68,905.11 and 12,656.20

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Solution

The fourth proportional to 45,940.93, 68,905.11 and 12,656.20 is: 18,982.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,940.93 : 68,905.11 = 12,656.20 : x
  2. Step 2: Convert to fraction form
    45,940.93/68,905.11 = 12,656.20/x
  3. Step 3: Cross multiply
    45,940.93x = 68,905.11 × 12,656.20
  4. Step 4: Simplify right side
    45,940.93x = 872,076,853.18
  5. Step 5: Solve for x
    x = 872,076,853.18/45,940.93
  6. Step 6: Final answer
    x = 18,982.57

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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.