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Finding the Fourth Proportional to 84,830.20, 127,245.30 and 80,942.20

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Solution

The fourth proportional to 84,830.20, 127,245.30 and 80,942.20 is: 121,413.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,830.20 : 127,245.30 = 80,942.20 : x
  2. Step 2: Convert to fraction form
    84,830.20/127,245.30 = 80,942.20/x
  3. Step 3: Cross multiply
    84,830.20x = 127,245.30 × 80,942.20
  4. Step 4: Simplify right side
    84,830.20x = 10,299,514,521.66
  5. Step 5: Solve for x
    x = 10,299,514,521.66/84,830.20
  6. Step 6: Final answer
    x = 121,413.30

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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.