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Finding the Fourth Proportional to 191,999.20, 287,998.80 and 178,877.20

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Solution

The fourth proportional to 191,999.20, 287,998.80 and 178,877.20 is: 268,315.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,999.20 : 287,998.80 = 178,877.20 : x
  2. Step 2: Convert to fraction form
    191,999.20/287,998.80 = 178,877.20/x
  3. Step 3: Cross multiply
    191,999.20x = 287,998.80 × 178,877.20
  4. Step 4: Simplify right side
    191,999.20x = 51,516,418,947.36
  5. Step 5: Solve for x
    x = 51,516,418,947.36/191,999.20
  6. Step 6: Final answer
    x = 268,315.80

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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.