Home / 99,975.12-137,965.92-54,653.64

Finding the Fourth Proportional to 99,975.12, 137,965.92 and 54,653.64

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Solution

The fourth proportional to 99,975.12, 137,965.92 and 54,653.64 is: 75,422.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,975.12 : 137,965.92 = 54,653.64 : x
  2. Step 2: Convert to fraction form
    99,975.12/137,965.92 = 54,653.64/x
  3. Step 3: Cross multiply
    99,975.12x = 137,965.92 × 54,653.64
  4. Step 4: Simplify right side
    99,975.12x = 7,540,339,723.95
  5. Step 5: Solve for x
    x = 7,540,339,723.95/99,975.12
  6. Step 6: Final answer
    x = 75,422.16

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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.