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Finding the Fourth Proportional to 100,635.36, 138,855.60 and 55,922.40

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Solution

The fourth proportional to 100,635.36, 138,855.60 and 55,922.40 is: 77,161.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,635.36 : 138,855.60 = 55,922.40 : x
  2. Step 2: Convert to fraction form
    100,635.36/138,855.60 = 55,922.40/x
  3. Step 3: Cross multiply
    100,635.36x = 138,855.60 × 55,922.40
  4. Step 4: Simplify right side
    100,635.36x = 7,765,138,405.44
  5. Step 5: Solve for x
    x = 7,765,138,405.44/100,635.36
  6. Step 6: Final answer
    x = 77,161.13

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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.