Home / 100,380.06-138,528.39-55,059.96

Finding the Fourth Proportional to 100,380.06, 138,528.39 and 55,059.96

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Solution

The fourth proportional to 100,380.06, 138,528.39 and 55,059.96 is: 75,984.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,380.06 : 138,528.39 = 55,059.96 : x
  2. Step 2: Convert to fraction form
    100,380.06/138,528.39 = 55,059.96/x
  3. Step 3: Cross multiply
    100,380.06x = 138,528.39 × 55,059.96
  4. Step 4: Simplify right side
    100,380.06x = 7,627,367,612.26
  5. Step 5: Solve for x
    x = 7,627,367,612.26/100,380.06
  6. Step 6: Final answer
    x = 75,984.89

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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.