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Finding the Fourth Proportional to 172,857.20, 259,285.80 and 154,486.40

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Solution

The fourth proportional to 172,857.20, 259,285.80 and 154,486.40 is: 231,729.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,857.20 : 259,285.80 = 154,486.40 : x
  2. Step 2: Convert to fraction form
    172,857.20/259,285.80 = 154,486.40/x
  3. Step 3: Cross multiply
    172,857.20x = 259,285.80 × 154,486.40
  4. Step 4: Simplify right side
    172,857.20x = 40,056,129,813.12
  5. Step 5: Solve for x
    x = 40,056,129,813.12/172,857.20
  6. Step 6: Final answer
    x = 231,729.60

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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.