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Finding the Fourth Proportional to 84,290.63, 126,435.94 and 21,961.13

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Solution

The fourth proportional to 84,290.63, 126,435.94 and 21,961.13 is: 32,941.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,290.63 : 126,435.94 = 21,961.13 : x
  2. Step 2: Convert to fraction form
    84,290.63/126,435.94 = 21,961.13/x
  3. Step 3: Cross multiply
    84,290.63x = 126,435.94 × 21,961.13
  4. Step 4: Simplify right side
    84,290.63x = 2,776,675,427.93
  5. Step 5: Solve for x
    x = 2,776,675,427.93/84,290.63
  6. Step 6: Final answer
    x = 32,941.69

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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.