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Finding the Fourth Proportional to 84,859.98, 127,289.95 and 21,680.23

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Solution

The fourth proportional to 84,859.98, 127,289.95 and 21,680.23 is: 32,520.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,859.98 : 127,289.95 = 21,680.23 : x
  2. Step 2: Convert to fraction form
    84,859.98/127,289.95 = 21,680.23/x
  3. Step 3: Cross multiply
    84,859.98x = 127,289.95 × 21,680.23
  4. Step 4: Simplify right side
    84,859.98x = 2,759,675,392.69
  5. Step 5: Solve for x
    x = 2,759,675,392.69/84,859.98
  6. Step 6: Final answer
    x = 32,520.34

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Similar ratio
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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.