Home / 285,518.62-428,282.79-108,109.18

Finding the Fourth Proportional to 285,518.62, 428,282.79 and 108,109.18

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Solution

The fourth proportional to 285,518.62, 428,282.79 and 108,109.18 is: 162,165.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,518.62 : 428,282.79 = 108,109.18 : x
  2. Step 2: Convert to fraction form
    285,518.62/428,282.79 = 108,109.18/x
  3. Step 3: Cross multiply
    285,518.62x = 428,282.79 × 108,109.18
  4. Step 4: Simplify right side
    285,518.62x = 46,301,301,973.07
  5. Step 5: Solve for x
    x = 46,301,301,973.07/285,518.62
  6. Step 6: Final answer
    x = 162,165.61

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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.