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Finding the Fourth Proportional to 191,617.51, 287,549.28 and 128,508.90

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Solution

The fourth proportional to 191,617.51, 287,549.28 and 128,508.90 is: 192,845.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,617.51 : 287,549.28 = 128,508.90 : x
  2. Step 2: Convert to fraction form
    191,617.51/287,549.28 = 128,508.90/x
  3. Step 3: Cross multiply
    191,617.51x = 287,549.28 × 128,508.90
  4. Step 4: Simplify right side
    191,617.51x = 36,952,639,588.30
  5. Step 5: Solve for x
    x = 36,952,639,588.30/191,617.51
  6. Step 6: Final answer
    x = 192,845.84

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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.