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Finding the Fourth Proportional to 84,739.62, 127,110.16 and 21,559.80

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Solution

The fourth proportional to 84,739.62, 127,110.16 and 21,559.80 is: 32,339.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,739.62 : 127,110.16 = 21,559.80 : x
  2. Step 2: Convert to fraction form
    84,739.62/127,110.16 = 21,559.80/x
  3. Step 3: Cross multiply
    84,739.62x = 127,110.16 × 21,559.80
  4. Step 4: Simplify right side
    84,739.62x = 2,740,469,627.57
  5. Step 5: Solve for x
    x = 2,740,469,627.57/84,739.62
  6. Step 6: Final answer
    x = 32,339.89

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1.5x scale

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.