Home / 285,711.30-428,628.78-86,016.33

Finding the Fourth Proportional to 285,711.30, 428,628.78 and 86,016.33

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Solution

The fourth proportional to 285,711.30, 428,628.78 and 86,016.33 is: 129,043.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,711.30 : 428,628.78 = 86,016.33 : x
  2. Step 2: Convert to fraction form
    285,711.30/428,628.78 = 86,016.33/x
  3. Step 3: Cross multiply
    285,711.30x = 428,628.78 × 86,016.33
  4. Step 4: Simplify right side
    285,711.30x = 36,869,074,587.98
  5. Step 5: Solve for x
    x = 36,869,074,587.98/285,711.30
  6. Step 6: Final answer
    x = 129,043.11

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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.