Home / 100,172.21-138,236.33-57,150.59

Finding the Fourth Proportional to 100,172.21, 138,236.33 and 57,150.59

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Solution

The fourth proportional to 100,172.21, 138,236.33 and 57,150.59 is: 78,867.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,172.21 : 138,236.33 = 57,150.59 : x
  2. Step 2: Convert to fraction form
    100,172.21/138,236.33 = 57,150.59/x
  3. Step 3: Cross multiply
    100,172.21x = 138,236.33 × 57,150.59
  4. Step 4: Simplify right side
    100,172.21x = 7,900,286,842.00
  5. Step 5: Solve for x
    x = 7,900,286,842.00/100,172.21
  6. Step 6: Final answer
    x = 78,867.06

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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.