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Finding the Fourth Proportional to 100,444.52, 138,608.66 and 55,121.48

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Solution

The fourth proportional to 100,444.52, 138,608.66 and 55,121.48 is: 76,065.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,444.52 : 138,608.66 = 55,121.48 : x
  2. Step 2: Convert to fraction form
    100,444.52/138,608.66 = 55,121.48/x
  3. Step 3: Cross multiply
    100,444.52x = 138,608.66 × 55,121.48
  4. Step 4: Simplify right side
    100,444.52x = 7,640,314,480.02
  5. Step 5: Solve for x
    x = 7,640,314,480.02/100,444.52
  6. Step 6: Final answer
    x = 76,065.02

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.