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Finding the Fourth Proportional to 208,886.60, 313,329.90 and 129,960.20

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Solution

The fourth proportional to 208,886.60, 313,329.90 and 129,960.20 is: 194,940.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,886.60 : 313,329.90 = 129,960.20 : x
  2. Step 2: Convert to fraction form
    208,886.60/313,329.90 = 129,960.20/x
  3. Step 3: Cross multiply
    208,886.60x = 313,329.90 × 129,960.20
  4. Step 4: Simplify right side
    208,886.60x = 40,720,416,469.98
  5. Step 5: Solve for x
    x = 40,720,416,469.98/208,886.60
  6. Step 6: Final answer
    x = 194,940.30

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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.