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Finding the Fourth Proportional to 100,611.25, 138,844.07 and 55,899.25

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Solution

The fourth proportional to 100,611.25, 138,844.07 and 55,899.25 is: 77,141.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,611.25 : 138,844.07 = 55,899.25 : x
  2. Step 2: Convert to fraction form
    100,611.25/138,844.07 = 55,899.25/x
  3. Step 3: Cross multiply
    100,611.25x = 138,844.07 × 55,899.25
  4. Step 4: Simplify right side
    100,611.25x = 7,761,279,100.45
  5. Step 5: Solve for x
    x = 7,761,279,100.45/100,611.25
  6. Step 6: Final answer
    x = 77,141.27

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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.