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Finding the Fourth Proportional to 102,760.80, 154,141.20 and 28,879.20

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Solution

The fourth proportional to 102,760.80, 154,141.20 and 28,879.20 is: 43,318.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,760.80 : 154,141.20 = 28,879.20 : x
  2. Step 2: Convert to fraction form
    102,760.80/154,141.20 = 28,879.20/x
  3. Step 3: Cross multiply
    102,760.80x = 154,141.20 × 28,879.20
  4. Step 4: Simplify right side
    102,760.80x = 4,451,474,543.04
  5. Step 5: Solve for x
    x = 4,451,474,543.04/102,760.80
  6. Step 6: Final answer
    x = 43,318.80

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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.