Home / 100,419.06-138,579.68-55,096.18

Finding the Fourth Proportional to 100,419.06, 138,579.68 and 55,096.18

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Solution

The fourth proportional to 100,419.06, 138,579.68 and 55,096.18 is: 76,033.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,419.06 : 138,579.68 = 55,096.18 : x
  2. Step 2: Convert to fraction form
    100,419.06/138,579.68 = 55,096.18/x
  3. Step 3: Cross multiply
    100,419.06x = 138,579.68 × 55,096.18
  4. Step 4: Simplify right side
    100,419.06x = 7,635,210,993.62
  5. Step 5: Solve for x
    x = 7,635,210,993.62/100,419.06
  6. Step 6: Final answer
    x = 76,033.48

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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.