Home / 285,976.71-428,968.10-86,298.85

Finding the Fourth Proportional to 285,976.71, 428,968.10 and 86,298.85

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Solution

The fourth proportional to 285,976.71, 428,968.10 and 86,298.85 is: 129,449.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,976.71 : 428,968.10 = 86,298.85 : x
  2. Step 2: Convert to fraction form
    285,976.71/428,968.10 = 86,298.85/x
  3. Step 3: Cross multiply
    285,976.71x = 428,968.10 × 86,298.85
  4. Step 4: Simplify right side
    285,976.71x = 37,019,454,468.64
  5. Step 5: Solve for x
    x = 37,019,454,468.64/285,976.71
  6. Step 6: Final answer
    x = 129,449.19

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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.