Home / 285,905.75-428,772.23-86,209.43

Finding the Fourth Proportional to 285,905.75, 428,772.23 and 86,209.43

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Solution

The fourth proportional to 285,905.75, 428,772.23 and 86,209.43 is: 129,288.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,905.75 : 428,772.23 = 86,209.43 : x
  2. Step 2: Convert to fraction form
    285,905.75/428,772.23 = 86,209.43/x
  3. Step 3: Cross multiply
    285,905.75x = 428,772.23 × 86,209.43
  4. Step 4: Simplify right side
    285,905.75x = 36,964,209,117.08
  5. Step 5: Solve for x
    x = 36,964,209,117.08/285,905.75
  6. Step 6: Final answer
    x = 129,288.09

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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.