Home / 100,220.72-138,397.56-75,026.48

Finding the Fourth Proportional to 100,220.72, 138,397.56 and 75,026.48

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Solution

The fourth proportional to 100,220.72, 138,397.56 and 75,026.48 is: 103,606.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,220.72 : 138,397.56 = 75,026.48 : x
  2. Step 2: Convert to fraction form
    100,220.72/138,397.56 = 75,026.48/x
  3. Step 3: Cross multiply
    100,220.72x = 138,397.56 × 75,026.48
  4. Step 4: Simplify right side
    100,220.72x = 10,383,481,767.39
  5. Step 5: Solve for x
    x = 10,383,481,767.39/100,220.72
  6. Step 6: Final answer
    x = 103,606.14

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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.