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Finding the Fourth Proportional to 191,617.01, 287,548.53 and 128,508.40

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Solution

The fourth proportional to 191,617.01, 287,548.53 and 128,508.40 is: 192,845.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,617.01 : 287,548.53 = 128,508.40 : x
  2. Step 2: Convert to fraction form
    191,617.01/287,548.53 = 128,508.40/x
  3. Step 3: Cross multiply
    191,617.01x = 287,548.53 × 128,508.40
  4. Step 4: Simplify right side
    191,617.01x = 36,952,399,432.37
  5. Step 5: Solve for x
    x = 36,952,399,432.37/191,617.01
  6. Step 6: Final answer
    x = 192,845.09

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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.