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Finding the Fourth Proportional to 79,801.39, 119,702.09 and 20,643.04

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Solution

The fourth proportional to 79,801.39, 119,702.09 and 20,643.04 is: 30,964.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,801.39 : 119,702.09 = 20,643.04 : x
  2. Step 2: Convert to fraction form
    79,801.39/119,702.09 = 20,643.04/x
  3. Step 3: Cross multiply
    79,801.39x = 119,702.09 × 20,643.04
  4. Step 4: Simplify right side
    79,801.39x = 2,471,015,031.95
  5. Step 5: Solve for x
    x = 2,471,015,031.95/79,801.39
  6. Step 6: Final answer
    x = 30,964.56

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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.