Home / 136,329.21-188,139.83-78,967.62

Finding the Fourth Proportional to 136,329.21, 188,139.83 and 78,967.62

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Solution

The fourth proportional to 136,329.21, 188,139.83 and 78,967.62 is: 108,978.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,329.21 : 188,139.83 = 78,967.62 : x
  2. Step 2: Convert to fraction form
    136,329.21/188,139.83 = 78,967.62/x
  3. Step 3: Cross multiply
    136,329.21x = 188,139.83 × 78,967.62
  4. Step 4: Simplify right side
    136,329.21x = 14,856,954,583.09
  5. Step 5: Solve for x
    x = 14,856,954,583.09/136,329.21
  6. Step 6: Final answer
    x = 108,978.51

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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.