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Finding the Fourth Proportional to 84,858.91, 127,292.61 and 21,679.52

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Solution

The fourth proportional to 84,858.91, 127,292.61 and 21,679.52 is: 32,520.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,858.91 : 127,292.61 = 21,679.52 : x
  2. Step 2: Convert to fraction form
    84,858.91/127,292.61 = 21,679.52/x
  3. Step 3: Cross multiply
    84,858.91x = 127,292.61 × 21,679.52
  4. Step 4: Simplify right side
    84,858.91x = 2,759,642,129.18
  5. Step 5: Solve for x
    x = 2,759,642,129.18/84,858.91
  6. Step 6: Final answer
    x = 32,520.36

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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.