Home / 100,556.48-138,635.88-83,575.28

Finding the Fourth Proportional to 100,556.48, 138,635.88 and 83,575.28

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Solution

The fourth proportional to 100,556.48, 138,635.88 and 83,575.28 is: 115,224.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,556.48 : 138,635.88 = 83,575.28 : x
  2. Step 2: Convert to fraction form
    100,556.48/138,635.88 = 83,575.28/x
  3. Step 3: Cross multiply
    100,556.48x = 138,635.88 × 83,575.28
  4. Step 4: Simplify right side
    100,556.48x = 11,586,532,489.05
  5. Step 5: Solve for x
    x = 11,586,532,489.05/100,556.48
  6. Step 6: Final answer
    x = 115,224.13

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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.