Home / 318,865.82-478,366.20-105,621.67

Finding the Fourth Proportional to 318,865.82, 478,366.20 and 105,621.67

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Solution

The fourth proportional to 318,865.82, 478,366.20 and 105,621.67 is: 158,454.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,865.82 : 478,366.20 = 105,621.67 : x
  2. Step 2: Convert to fraction form
    318,865.82/478,366.20 = 105,621.67/x
  3. Step 3: Cross multiply
    318,865.82x = 478,366.20 × 105,621.67
  4. Step 4: Simplify right side
    318,865.82x = 50,525,834,523.72
  5. Step 5: Solve for x
    x = 50,525,834,523.72/318,865.82
  6. Step 6: Final answer
    x = 158,454.85

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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.