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Finding the Fourth Proportional to 100,968.85, 139,336.36 and 55,646.88

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Solution

The fourth proportional to 100,968.85, 139,336.36 and 55,646.88 is: 76,792.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,968.85 : 139,336.36 = 55,646.88 : x
  2. Step 2: Convert to fraction form
    100,968.85/139,336.36 = 55,646.88/x
  3. Step 3: Cross multiply
    100,968.85x = 139,336.36 × 55,646.88
  4. Step 4: Simplify right side
    100,968.85x = 7,753,633,704.56
  5. Step 5: Solve for x
    x = 7,753,633,704.56/100,968.85
  6. Step 6: Final answer
    x = 76,792.33

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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.