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Finding the Fourth Proportional to 191,716.70, 287,903.10 and 185,811.80

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Solution

The fourth proportional to 191,716.70, 287,903.10 and 185,811.80 is: 279,035.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,716.70 : 287,903.10 = 185,811.80 : x
  2. Step 2: Convert to fraction form
    191,716.70/287,903.10 = 185,811.80/x
  3. Step 3: Cross multiply
    191,716.70x = 287,903.10 × 185,811.80
  4. Step 4: Simplify right side
    191,716.70x = 53,495,793,236.58
  5. Step 5: Solve for x
    x = 53,495,793,236.58/191,716.70
  6. Step 6: Final answer
    x = 279,035.65

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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.