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Finding the Fourth Proportional to 172,396.55, 258,114.90 and 87,974.30

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Solution

The fourth proportional to 172,396.55, 258,114.90 and 87,974.30 is: 131,716.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,396.55 : 258,114.90 = 87,974.30 : x
  2. Step 2: Convert to fraction form
    172,396.55/258,114.90 = 87,974.30/x
  3. Step 3: Cross multiply
    172,396.55x = 258,114.90 × 87,974.30
  4. Step 4: Simplify right side
    172,396.55x = 22,707,477,647.07
  5. Step 5: Solve for x
    x = 22,707,477,647.07/172,396.55
  6. Step 6: Final answer
    x = 131,716.54

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1.5x scale

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.