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Finding the Fourth Proportional to 129,891.60, 194,448.60 and 115,894.80

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Solution

The fourth proportional to 129,891.60, 194,448.60 and 115,894.80 is: 173,495.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,891.60 : 194,448.60 = 115,894.80 : x
  2. Step 2: Convert to fraction form
    129,891.60/194,448.60 = 115,894.80/x
  3. Step 3: Cross multiply
    129,891.60x = 194,448.60 × 115,894.80
  4. Step 4: Simplify right side
    129,891.60x = 22,535,581,607.28
  5. Step 5: Solve for x
    x = 22,535,581,607.28/129,891.60
  6. Step 6: Final answer
    x = 173,495.30

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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.