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Finding the Fourth Proportional to 172,879.20, 259,318.80 and 162,381.60

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Solution

The fourth proportional to 172,879.20, 259,318.80 and 162,381.60 is: 243,572.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,879.20 : 259,318.80 = 162,381.60 : x
  2. Step 2: Convert to fraction form
    172,879.20/259,318.80 = 162,381.60/x
  3. Step 3: Cross multiply
    172,879.20x = 259,318.80 × 162,381.60
  4. Step 4: Simplify right side
    172,879.20x = 42,108,601,654.08
  5. Step 5: Solve for x
    x = 42,108,601,654.08/172,879.20
  6. Step 6: Final answer
    x = 243,572.40

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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.