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Finding the Fourth Proportional to 172,979.80, 259,477.80 and 54,660.40

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Solution

The fourth proportional to 172,979.80, 259,477.80 and 54,660.40 is: 81,993.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,979.80 : 259,477.80 = 54,660.40 : x
  2. Step 2: Convert to fraction form
    172,979.80/259,477.80 = 54,660.40/x
  3. Step 3: Cross multiply
    172,979.80x = 259,477.80 × 54,660.40
  4. Step 4: Simplify right side
    172,979.80x = 14,183,160,339.12
  5. Step 5: Solve for x
    x = 14,183,160,339.12/172,979.80
  6. Step 6: Final answer
    x = 81,993.16

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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.