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Finding the Fourth Proportional to 101,958, 140,696.97 and 56,638.86

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Solution

The fourth proportional to 101,958, 140,696.97 and 56,638.86 is: 78,158.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,958 : 140,696.97 = 56,638.86 : x
  2. Step 2: Convert to fraction form
    101,958/140,696.97 = 56,638.86/x
  3. Step 3: Cross multiply
    101,958x = 140,696.97 × 56,638.86
  4. Step 4: Simplify right side
    101,958x = 7,968,915,986.25
  5. Step 5: Solve for x
    x = 7,968,915,986.25/101,958
  6. Step 6: Final answer
    x = 78,158.81

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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.