Home / 172,137.78-258,306.44-72,289.35

Finding the Fourth Proportional to 172,137.78, 258,306.44 and 72,289.35

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Solution

The fourth proportional to 172,137.78, 258,306.44 and 72,289.35 is: 108,475.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,137.78 : 258,306.44 = 72,289.35 : x
  2. Step 2: Convert to fraction form
    172,137.78/258,306.44 = 72,289.35/x
  3. Step 3: Cross multiply
    172,137.78x = 258,306.44 × 72,289.35
  4. Step 4: Simplify right side
    172,137.78x = 18,672,804,286.97
  5. Step 5: Solve for x
    x = 18,672,804,286.97/172,137.78
  6. Step 6: Final answer
    x = 108,475.92

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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.