Home / 128,399.80-177,201.18-73,961.44

Finding the Fourth Proportional to 128,399.80, 177,201.18 and 73,961.44

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Solution

The fourth proportional to 128,399.80, 177,201.18 and 73,961.44 is: 102,072.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,399.80 : 177,201.18 = 73,961.44 : x
  2. Step 2: Convert to fraction form
    128,399.80/177,201.18 = 73,961.44/x
  3. Step 3: Cross multiply
    128,399.80x = 177,201.18 × 73,961.44
  4. Step 4: Simplify right side
    128,399.80x = 13,106,054,442.50
  5. Step 5: Solve for x
    x = 13,106,054,442.50/128,399.80
  6. Step 6: Final answer
    x = 102,072.23

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1.5x scale

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.