Home / 85,310.20-127,780.62-61,885

Finding the Fourth Proportional to 85,310.20, 127,780.62 and 61,885

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Solution

The fourth proportional to 85,310.20, 127,780.62 and 61,885 is: 92,693.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,310.20 : 127,780.62 = 61,885 : x
  2. Step 2: Convert to fraction form
    85,310.20/127,780.62 = 61,885/x
  3. Step 3: Cross multiply
    85,310.20x = 127,780.62 × 61,885
  4. Step 4: Simplify right side
    85,310.20x = 7,907,703,668.70
  5. Step 5: Solve for x
    x = 7,907,703,668.70/85,310.20
  6. Step 6: Final answer
    x = 92,693.53

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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.