Home / 100,107.25-138,146.15-54,784.32

Finding the Fourth Proportional to 100,107.25, 138,146.15 and 54,784.32

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Solution

The fourth proportional to 100,107.25, 138,146.15 and 54,784.32 is: 75,601.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,107.25 : 138,146.15 = 54,784.32 : x
  2. Step 2: Convert to fraction form
    100,107.25/138,146.15 = 54,784.32/x
  3. Step 3: Cross multiply
    100,107.25x = 138,146.15 × 54,784.32
  4. Step 4: Simplify right side
    100,107.25x = 7,568,243,025.33
  5. Step 5: Solve for x
    x = 7,568,243,025.33/100,107.25
  6. Step 6: Final answer
    x = 75,601.35

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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.