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Finding the Fourth Proportional to 172,976.36, 259,495.91 and 78,251.18

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Solution

The fourth proportional to 172,976.36, 259,495.91 and 78,251.18 is: 117,390.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,976.36 : 259,495.91 = 78,251.18 : x
  2. Step 2: Convert to fraction form
    172,976.36/259,495.91 = 78,251.18/x
  3. Step 3: Cross multiply
    172,976.36x = 259,495.91 × 78,251.18
  4. Step 4: Simplify right side
    172,976.36x = 20,305,860,771.42
  5. Step 5: Solve for x
    x = 20,305,860,771.42/172,976.36
  6. Step 6: Final answer
    x = 117,390.96

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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.