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Finding the Fourth Proportional to 172,991.80, 259,439.10 and 54,699.40

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Solution

The fourth proportional to 172,991.80, 259,439.10 and 54,699.40 is: 82,033.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,991.80 : 259,439.10 = 54,699.40 : x
  2. Step 2: Convert to fraction form
    172,991.80/259,439.10 = 54,699.40/x
  3. Step 3: Cross multiply
    172,991.80x = 259,439.10 × 54,699.40
  4. Step 4: Simplify right side
    172,991.80x = 14,191,163,106.54
  5. Step 5: Solve for x
    x = 14,191,163,106.54/172,991.80
  6. Step 6: Final answer
    x = 82,033.73

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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.