Home / 285,623.70-428,349.20-85,891.07

Finding the Fourth Proportional to 285,623.70, 428,349.20 and 85,891.07

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Solution

The fourth proportional to 285,623.70, 428,349.20 and 85,891.07 is: 128,810.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,623.70 : 428,349.20 = 85,891.07 : x
  2. Step 2: Convert to fraction form
    285,623.70/428,349.20 = 85,891.07/x
  3. Step 3: Cross multiply
    285,623.70x = 428,349.20 × 85,891.07
  4. Step 4: Simplify right side
    285,623.70x = 36,791,368,550.44
  5. Step 5: Solve for x
    x = 36,791,368,550.44/285,623.70
  6. Step 6: Final answer
    x = 128,810.63

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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.