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Finding the Fourth Proportional to 172,028.80, 258,043.20 and 161,660.80

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Solution

The fourth proportional to 172,028.80, 258,043.20 and 161,660.80 is: 242,491.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,028.80 : 258,043.20 = 161,660.80 : x
  2. Step 2: Convert to fraction form
    172,028.80/258,043.20 = 161,660.80/x
  3. Step 3: Cross multiply
    172,028.80x = 258,043.20 × 161,660.80
  4. Step 4: Simplify right side
    172,028.80x = 41,715,470,146.56
  5. Step 5: Solve for x
    x = 41,715,470,146.56/172,028.80
  6. Step 6: Final answer
    x = 242,491.20

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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.