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Finding the Fourth Proportional to 84,798.12, 127,198.20 and 21,618.12

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Solution

The fourth proportional to 84,798.12, 127,198.20 and 21,618.12 is: 32,427.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,798.12 : 127,198.20 = 21,618.12 : x
  2. Step 2: Convert to fraction form
    84,798.12/127,198.20 = 21,618.12/x
  3. Step 3: Cross multiply
    84,798.12x = 127,198.20 × 21,618.12
  4. Step 4: Simplify right side
    84,798.12x = 2,749,785,951.38
  5. Step 5: Solve for x
    x = 2,749,785,951.38/84,798.12
  6. Step 6: Final answer
    x = 32,427.44

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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.