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Finding the Fourth Proportional to 172,664.80, 258,997.20 and 72,937.60

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Solution

The fourth proportional to 172,664.80, 258,997.20 and 72,937.60 is: 109,406.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,664.80 : 258,997.20 = 72,937.60 : x
  2. Step 2: Convert to fraction form
    172,664.80/258,997.20 = 72,937.60/x
  3. Step 3: Cross multiply
    172,664.80x = 258,997.20 × 72,937.60
  4. Step 4: Simplify right side
    172,664.80x = 18,890,634,174.72
  5. Step 5: Solve for x
    x = 18,890,634,174.72/172,664.80
  6. Step 6: Final answer
    x = 109,406.40

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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.