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Finding the Fourth Proportional to 84,085, 126,128.04 and 21,756.04

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Solution

The fourth proportional to 84,085, 126,128.04 and 21,756.04 is: 32,634.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,085 : 126,128.04 = 21,756.04 : x
  2. Step 2: Convert to fraction form
    84,085/126,128.04 = 21,756.04/x
  3. Step 3: Cross multiply
    84,085x = 126,128.04 × 21,756.04
  4. Step 4: Simplify right side
    84,085x = 2,744,046,683.36
  5. Step 5: Solve for x
    x = 2,744,046,683.36/84,085
  6. Step 6: Final answer
    x = 32,634.20

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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.