Home / 100,385.10-138,533.19-55,067.34

Finding the Fourth Proportional to 100,385.10, 138,533.19 and 55,067.34

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Solution

The fourth proportional to 100,385.10, 138,533.19 and 55,067.34 is: 75,993.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,385.10 : 138,533.19 = 55,067.34 : x
  2. Step 2: Convert to fraction form
    100,385.10/138,533.19 = 55,067.34/x
  3. Step 3: Cross multiply
    100,385.10x = 138,533.19 × 55,067.34
  4. Step 4: Simplify right side
    100,385.10x = 7,628,654,275.01
  5. Step 5: Solve for x
    x = 7,628,654,275.01/100,385.10
  6. Step 6: Final answer
    x = 75,993.89

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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.