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Finding the Fourth Proportional to 172,393.20, 258,662.70 and 109,261.80

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Solution

The fourth proportional to 172,393.20, 258,662.70 and 109,261.80 is: 163,938.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,393.20 : 258,662.70 = 109,261.80 : x
  2. Step 2: Convert to fraction form
    172,393.20/258,662.70 = 109,261.80/x
  3. Step 3: Cross multiply
    172,393.20x = 258,662.70 × 109,261.80
  4. Step 4: Simplify right side
    172,393.20x = 28,261,952,194.86
  5. Step 5: Solve for x
    x = 28,261,952,194.86/172,393.20
  6. Step 6: Final answer
    x = 163,938.90

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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.