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Finding the Fourth Proportional to 172,500.32, 258,662.97 and 78,925.88

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Solution

The fourth proportional to 172,500.32, 258,662.97 and 78,925.88 is: 118,348.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,500.32 : 258,662.97 = 78,925.88 : x
  2. Step 2: Convert to fraction form
    172,500.32/258,662.97 = 78,925.88/x
  3. Step 3: Cross multiply
    172,500.32x = 258,662.97 × 78,925.88
  4. Step 4: Simplify right side
    172,500.32x = 20,415,201,237.35
  5. Step 5: Solve for x
    x = 20,415,201,237.35/172,500.32
  6. Step 6: Final answer
    x = 118,348.78

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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.