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Finding the Fourth Proportional to 191,885.20, 287,568.60 and 128,525.20

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Solution

The fourth proportional to 191,885.20, 287,568.60 and 128,525.20 is: 192,614.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,885.20 : 287,568.60 = 128,525.20 : x
  2. Step 2: Convert to fraction form
    191,885.20/287,568.60 = 128,525.20/x
  3. Step 3: Cross multiply
    191,885.20x = 287,568.60 × 128,525.20
  4. Step 4: Simplify right side
    191,885.20x = 36,959,811,828.72
  5. Step 5: Solve for x
    x = 36,959,811,828.72/191,885.20
  6. Step 6: Final answer
    x = 192,614.19

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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.