Home / 100,622.12-138,849.48-55,299.60

Finding the Fourth Proportional to 100,622.12, 138,849.48 and 55,299.60

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Solution

The fourth proportional to 100,622.12, 138,849.48 and 55,299.60 is: 76,308.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,622.12 : 138,849.48 = 55,299.60 : x
  2. Step 2: Convert to fraction form
    100,622.12/138,849.48 = 55,299.60/x
  3. Step 3: Cross multiply
    100,622.12x = 138,849.48 × 55,299.60
  4. Step 4: Simplify right side
    100,622.12x = 7,678,320,704.21
  5. Step 5: Solve for x
    x = 7,678,320,704.21/100,622.12
  6. Step 6: Final answer
    x = 76,308.48

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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.