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Finding the Fourth Proportional to 191,383.80, 287,181.40 and 79,037.88

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Solution

The fourth proportional to 191,383.80, 287,181.40 and 79,037.88 is: 118,600.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,383.80 : 287,181.40 = 79,037.88 : x
  2. Step 2: Convert to fraction form
    191,383.80/287,181.40 = 79,037.88/x
  3. Step 3: Cross multiply
    191,383.80x = 287,181.40 × 79,037.88
  4. Step 4: Simplify right side
    191,383.80x = 22,698,207,595.53
  5. Step 5: Solve for x
    x = 22,698,207,595.53/191,383.80
  6. Step 6: Final answer
    x = 118,600.47

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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.