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Finding the Fourth Proportional to 84,851.10, 127,288.80 and 28,693.80

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Solution

The fourth proportional to 84,851.10, 127,288.80 and 28,693.80 is: 43,044.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,851.10 : 127,288.80 = 28,693.80 : x
  2. Step 2: Convert to fraction form
    84,851.10/127,288.80 = 28,693.80/x
  3. Step 3: Cross multiply
    84,851.10x = 127,288.80 × 28,693.80
  4. Step 4: Simplify right side
    84,851.10x = 3,652,399,369.44
  5. Step 5: Solve for x
    x = 3,652,399,369.44/84,851.10
  6. Step 6: Final answer
    x = 43,044.81

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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.