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Finding the Fourth Proportional to 84,017.25, 126,025.88 and 21,687.75

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Solution

The fourth proportional to 84,017.25, 126,025.88 and 21,687.75 is: 32,531.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,017.25 : 126,025.88 = 21,687.75 : x
  2. Step 2: Convert to fraction form
    84,017.25/126,025.88 = 21,687.75/x
  3. Step 3: Cross multiply
    84,017.25x = 126,025.88 × 21,687.75
  4. Step 4: Simplify right side
    84,017.25x = 2,733,217,670.53
  5. Step 5: Solve for x
    x = 2,733,217,670.53/84,017.25
  6. Step 6: Final answer
    x = 32,531.63

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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.