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Finding the Fourth Proportional to 188,861.20, 283,291.80 and 129,878.80

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Solution

The fourth proportional to 188,861.20, 283,291.80 and 129,878.80 is: 194,818.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,861.20 : 283,291.80 = 129,878.80 : x
  2. Step 2: Convert to fraction form
    188,861.20/283,291.80 = 129,878.80/x
  3. Step 3: Cross multiply
    188,861.20x = 283,291.80 × 129,878.80
  4. Step 4: Simplify right side
    188,861.20x = 36,793,599,033.84
  5. Step 5: Solve for x
    x = 36,793,599,033.84/188,861.20
  6. Step 6: Final answer
    x = 194,818.20

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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.