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Finding the Fourth Proportional to 68,771.16, 103,157.13 and 31,305.03

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Solution

The fourth proportional to 68,771.16, 103,157.13 and 31,305.03 is: 46,957.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,771.16 : 103,157.13 = 31,305.03 : x
  2. Step 2: Convert to fraction form
    68,771.16/103,157.13 = 31,305.03/x
  3. Step 3: Cross multiply
    68,771.16x = 103,157.13 × 31,305.03
  4. Step 4: Simplify right side
    68,771.16x = 3,229,337,316.15
  5. Step 5: Solve for x
    x = 3,229,337,316.15/68,771.16
  6. Step 6: Final answer
    x = 46,957.72

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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.