Home / 100,208.10-138,287.30-54,267.82

Finding the Fourth Proportional to 100,208.10, 138,287.30 and 54,267.82

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Solution

The fourth proportional to 100,208.10, 138,287.30 and 54,267.82 is: 74,889.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,208.10 : 138,287.30 = 54,267.82 : x
  2. Step 2: Convert to fraction form
    100,208.10/138,287.30 = 54,267.82/x
  3. Step 3: Cross multiply
    100,208.10x = 138,287.30 × 54,267.82
  4. Step 4: Simplify right side
    100,208.10x = 7,504,550,304.69
  5. Step 5: Solve for x
    x = 7,504,550,304.69/100,208.10
  6. Step 6: Final answer
    x = 74,889.66

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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.