Home / 172,138.85-258,187.73-45,788.34

Finding the Fourth Proportional to 172,138.85, 258,187.73 and 45,788.34

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Solution

The fourth proportional to 172,138.85, 258,187.73 and 45,788.34 is: 68,677.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,138.85 : 258,187.73 = 45,788.34 : x
  2. Step 2: Convert to fraction form
    172,138.85/258,187.73 = 45,788.34/x
  3. Step 3: Cross multiply
    172,138.85x = 258,187.73 × 45,788.34
  4. Step 4: Simplify right side
    172,138.85x = 11,821,986,980.80
  5. Step 5: Solve for x
    x = 11,821,986,980.80/172,138.85
  6. Step 6: Final answer
    x = 68,677.04

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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.