Home / 100,268.94-138,390.58-66,279.18

Finding the Fourth Proportional to 100,268.94, 138,390.58 and 66,279.18

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Solution

The fourth proportional to 100,268.94, 138,390.58 and 66,279.18 is: 91,478.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,268.94 : 138,390.58 = 66,279.18 : x
  2. Step 2: Convert to fraction form
    100,268.94/138,390.58 = 66,279.18/x
  3. Step 3: Cross multiply
    100,268.94x = 138,390.58 × 66,279.18
  4. Step 4: Simplify right side
    100,268.94x = 9,172,414,162.12
  5. Step 5: Solve for x
    x = 9,172,414,162.12/100,268.94
  6. Step 6: Final answer
    x = 91,478.12

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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.