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Finding the Fourth Proportional to 84,858, 127,287.42 and 28,698.48

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Solution

The fourth proportional to 84,858, 127,287.42 and 28,698.48 is: 43,047.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,858 : 127,287.42 = 28,698.48 : x
  2. Step 2: Convert to fraction form
    84,858/127,287.42 = 28,698.48/x
  3. Step 3: Cross multiply
    84,858x = 127,287.42 × 28,698.48
  4. Step 4: Simplify right side
    84,858x = 3,652,955,477.12
  5. Step 5: Solve for x
    x = 3,652,955,477.12/84,858
  6. Step 6: Final answer
    x = 43,047.86

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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.