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Finding the Fourth Proportional to 172,004.80, 258,007.20 and 115,871.80

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Solution

The fourth proportional to 172,004.80, 258,007.20 and 115,871.80 is: 173,807.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,004.80 : 258,007.20 = 115,871.80 : x
  2. Step 2: Convert to fraction form
    172,004.80/258,007.20 = 115,871.80/x
  3. Step 3: Cross multiply
    172,004.80x = 258,007.20 × 115,871.80
  4. Step 4: Simplify right side
    172,004.80x = 29,895,758,676.96
  5. Step 5: Solve for x
    x = 29,895,758,676.96/172,004.80
  6. Step 6: Final answer
    x = 173,807.70

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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.