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Finding the Fourth Proportional to 100,371.07, 138,512.07 and 55,659.07

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Solution

The fourth proportional to 100,371.07, 138,512.07 and 55,659.07 is: 76,809.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,371.07 : 138,512.07 = 55,659.07 : x
  2. Step 2: Convert to fraction form
    100,371.07/138,512.07 = 55,659.07/x
  3. Step 3: Cross multiply
    100,371.07x = 138,512.07 × 55,659.07
  4. Step 4: Simplify right side
    100,371.07x = 7,709,452,999.97
  5. Step 5: Solve for x
    x = 7,709,452,999.97/100,371.07
  6. Step 6: Final answer
    x = 76,809.51

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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.