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Finding the Fourth Proportional to 172,400.96, 258,601.44 and 47,739.20

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Solution

The fourth proportional to 172,400.96, 258,601.44 and 47,739.20 is: 71,608.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,400.96 : 258,601.44 = 47,739.20 : x
  2. Step 2: Convert to fraction form
    172,400.96/258,601.44 = 47,739.20/x
  3. Step 3: Cross multiply
    172,400.96x = 258,601.44 × 47,739.20
  4. Step 4: Simplify right side
    172,400.96x = 12,345,425,864.45
  5. Step 5: Solve for x
    x = 12,345,425,864.45/172,400.96
  6. Step 6: Final answer
    x = 71,608.80

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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.