Home / 78,534.28-117,861.36-39,124.54

Finding the Fourth Proportional to 78,534.28, 117,861.36 and 39,124.54

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Solution

The fourth proportional to 78,534.28, 117,861.36 and 39,124.54 is: 58,716.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,534.28 : 117,861.36 = 39,124.54 : x
  2. Step 2: Convert to fraction form
    78,534.28/117,861.36 = 39,124.54/x
  3. Step 3: Cross multiply
    78,534.28x = 117,861.36 × 39,124.54
  4. Step 4: Simplify right side
    78,534.28x = 4,611,271,493.77
  5. Step 5: Solve for x
    x = 4,611,271,493.77/78,534.28
  6. Step 6: Final answer
    x = 58,716.67

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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.