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Finding the Fourth Proportional to 191,875.20, 287,553.60 and 128,515.20

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Solution

The fourth proportional to 191,875.20, 287,553.60 and 128,515.20 is: 192,599.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,875.20 : 287,553.60 = 128,515.20 : x
  2. Step 2: Convert to fraction form
    191,875.20/287,553.60 = 128,515.20/x
  3. Step 3: Cross multiply
    191,875.20x = 287,553.60 × 128,515.20
  4. Step 4: Simplify right side
    191,875.20x = 36,955,008,414.72
  5. Step 5: Solve for x
    x = 36,955,008,414.72/191,875.20
  6. Step 6: Final answer
    x = 192,599.19

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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.