Home / 129,180.34-178,285.26-72,591.67

Finding the Fourth Proportional to 129,180.34, 178,285.26 and 72,591.67

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Solution

The fourth proportional to 129,180.34, 178,285.26 and 72,591.67 is: 100,185.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,180.34 : 178,285.26 = 72,591.67 : x
  2. Step 2: Convert to fraction form
    129,180.34/178,285.26 = 72,591.67/x
  3. Step 3: Cross multiply
    129,180.34x = 178,285.26 × 72,591.67
  4. Step 4: Simplify right side
    129,180.34x = 12,942,024,759.78
  5. Step 5: Solve for x
    x = 12,942,024,759.78/129,180.34
  6. Step 6: Final answer
    x = 100,185.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.