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Finding the Fourth Proportional to 100,995.36, 139,367.33 and 55,671

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Solution

The fourth proportional to 100,995.36, 139,367.33 and 55,671 is: 76,822.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,995.36 : 139,367.33 = 55,671 : x
  2. Step 2: Convert to fraction form
    100,995.36/139,367.33 = 55,671/x
  3. Step 3: Cross multiply
    100,995.36x = 139,367.33 × 55,671
  4. Step 4: Simplify right side
    100,995.36x = 7,758,718,628.43
  5. Step 5: Solve for x
    x = 7,758,718,628.43/100,995.36
  6. Step 6: Final answer
    x = 76,822.53

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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.