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Finding the Fourth Proportional to 100,333.63, 138,461.97 and 55,015.75

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Solution

The fourth proportional to 100,333.63, 138,461.97 and 55,015.75 is: 75,922.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,333.63 : 138,461.97 = 55,015.75 : x
  2. Step 2: Convert to fraction form
    100,333.63/138,461.97 = 55,015.75/x
  3. Step 3: Cross multiply
    100,333.63x = 138,461.97 × 55,015.75
  4. Step 4: Simplify right side
    100,333.63x = 7,617,589,126.03
  5. Step 5: Solve for x
    x = 7,617,589,126.03/100,333.63
  6. Step 6: Final answer
    x = 75,922.59

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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.