Home / 100,819.21-139,129.44-55,496.22

Finding the Fourth Proportional to 100,819.21, 139,129.44 and 55,496.22

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Solution

The fourth proportional to 100,819.21, 139,129.44 and 55,496.22 is: 76,584.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,819.21 : 139,129.44 = 55,496.22 : x
  2. Step 2: Convert to fraction form
    100,819.21/139,129.44 = 55,496.22/x
  3. Step 3: Cross multiply
    100,819.21x = 139,129.44 × 55,496.22
  4. Step 4: Simplify right side
    100,819.21x = 7,721,158,010.72
  5. Step 5: Solve for x
    x = 7,721,158,010.72/100,819.21
  6. Step 6: Final answer
    x = 76,584.19

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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.