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Finding the Fourth Proportional to 342,213.72, 513,149.28 and 105,525.66

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Solution

The fourth proportional to 342,213.72, 513,149.28 and 105,525.66 is: 158,235.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,213.72 : 513,149.28 = 105,525.66 : x
  2. Step 2: Convert to fraction form
    342,213.72/513,149.28 = 105,525.66/x
  3. Step 3: Cross multiply
    342,213.72x = 513,149.28 × 105,525.66
  4. Step 4: Simplify right side
    342,213.72x = 54,150,416,450.52
  5. Step 5: Solve for x
    x = 54,150,416,450.52/342,213.72
  6. Step 6: Final answer
    x = 158,235.67

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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.