Home / 285,389.10-428,087.85-135,644.67

Finding the Fourth Proportional to 285,389.10, 428,087.85 and 135,644.67

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Solution

The fourth proportional to 285,389.10, 428,087.85 and 135,644.67 is: 203,469.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,389.10 : 428,087.85 = 135,644.67 : x
  2. Step 2: Convert to fraction form
    285,389.10/428,087.85 = 135,644.67/x
  3. Step 3: Cross multiply
    285,389.10x = 428,087.85 × 135,644.67
  4. Step 4: Simplify right side
    285,389.10x = 58,067,835,144.26
  5. Step 5: Solve for x
    x = 58,067,835,144.26/285,389.10
  6. Step 6: Final answer
    x = 203,469.00

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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.