Home / 136,338.20-188,179.87-78,968.28

Finding the Fourth Proportional to 136,338.20, 188,179.87 and 78,968.28

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Solution

The fourth proportional to 136,338.20, 188,179.87 and 78,968.28 is: 108,995.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,338.20 : 188,179.87 = 78,968.28 : x
  2. Step 2: Convert to fraction form
    136,338.20/188,179.87 = 78,968.28/x
  3. Step 3: Cross multiply
    136,338.20x = 188,179.87 × 78,968.28
  4. Step 4: Simplify right side
    136,338.20x = 14,860,240,664.52
  5. Step 5: Solve for x
    x = 14,860,240,664.52/136,338.20
  6. Step 6: Final answer
    x = 108,995.43

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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.