Home / 285,986.20-428,979.30-75,645.40

Finding the Fourth Proportional to 285,986.20, 428,979.30 and 75,645.40

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Solution

The fourth proportional to 285,986.20, 428,979.30 and 75,645.40 is: 113,468.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,986.20 : 428,979.30 = 75,645.40 : x
  2. Step 2: Convert to fraction form
    285,986.20/428,979.30 = 75,645.40/x
  3. Step 3: Cross multiply
    285,986.20x = 428,979.30 × 75,645.40
  4. Step 4: Simplify right side
    285,986.20x = 32,450,310,740.22
  5. Step 5: Solve for x
    x = 32,450,310,740.22/285,986.20
  6. Step 6: Final answer
    x = 113,468.10

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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.