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Finding the Fourth Proportional to 191,889.20, 287,574.60 and 128,529.20

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Solution

The fourth proportional to 191,889.20, 287,574.60 and 128,529.20 is: 192,620.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,889.20 : 287,574.60 = 128,529.20 : x
  2. Step 2: Convert to fraction form
    191,889.20/287,574.60 = 128,529.20/x
  3. Step 3: Cross multiply
    191,889.20x = 287,574.60 × 128,529.20
  4. Step 4: Simplify right side
    191,889.20x = 36,961,733,278.32
  5. Step 5: Solve for x
    x = 36,961,733,278.32/191,889.20
  6. Step 6: Final answer
    x = 192,620.19

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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.