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Finding the Fourth Proportional to 84,301.20, 126,451.80 and 80,413.20

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Solution

The fourth proportional to 84,301.20, 126,451.80 and 80,413.20 is: 120,619.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,301.20 : 126,451.80 = 80,413.20 : x
  2. Step 2: Convert to fraction form
    84,301.20/126,451.80 = 80,413.20/x
  3. Step 3: Cross multiply
    84,301.20x = 126,451.80 × 80,413.20
  4. Step 4: Simplify right side
    84,301.20x = 10,168,393,883.76
  5. Step 5: Solve for x
    x = 10,168,393,883.76/84,301.20
  6. Step 6: Final answer
    x = 120,619.80

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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.