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Finding the Fourth Proportional to 191,887.20, 287,571.60 and 128,527.20

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Solution

The fourth proportional to 191,887.20, 287,571.60 and 128,527.20 is: 192,617.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,887.20 : 287,571.60 = 128,527.20 : x
  2. Step 2: Convert to fraction form
    191,887.20/287,571.60 = 128,527.20/x
  3. Step 3: Cross multiply
    191,887.20x = 287,571.60 × 128,527.20
  4. Step 4: Simplify right side
    191,887.20x = 36,960,772,547.52
  5. Step 5: Solve for x
    x = 36,960,772,547.52/191,887.20
  6. Step 6: Final answer
    x = 192,617.19

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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.