Home / 75,986.20-113,979.30-72,357.40

Finding the Fourth Proportional to 75,986.20, 113,979.30 and 72,357.40

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Solution

The fourth proportional to 75,986.20, 113,979.30 and 72,357.40 is: 108,536.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,986.20 : 113,979.30 = 72,357.40 : x
  2. Step 2: Convert to fraction form
    75,986.20/113,979.30 = 72,357.40/x
  3. Step 3: Cross multiply
    75,986.20x = 113,979.30 × 72,357.40
  4. Step 4: Simplify right side
    75,986.20x = 8,247,245,801.82
  5. Step 5: Solve for x
    x = 8,247,245,801.82/75,986.20
  6. Step 6: Final answer
    x = 108,536.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.