Home / 100,121.16-138,161.57-54,799.05

Finding the Fourth Proportional to 100,121.16, 138,161.57 and 54,799.05

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Solution

The fourth proportional to 100,121.16, 138,161.57 and 54,799.05 is: 75,619.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,121.16 : 138,161.57 = 54,799.05 : x
  2. Step 2: Convert to fraction form
    100,121.16/138,161.57 = 54,799.05/x
  3. Step 3: Cross multiply
    100,121.16x = 138,161.57 × 54,799.05
  4. Step 4: Simplify right side
    100,121.16x = 7,571,122,782.51
  5. Step 5: Solve for x
    x = 7,571,122,782.51/100,121.16
  6. Step 6: Final answer
    x = 75,619.61

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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.