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Finding the Fourth Proportional to 191,446.84, 287,170.32 and 86,142.79

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Solution

The fourth proportional to 191,446.84, 287,170.32 and 86,142.79 is: 129,214.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,446.84 : 287,170.32 = 86,142.79 : x
  2. Step 2: Convert to fraction form
    191,446.84/287,170.32 = 86,142.79/x
  3. Step 3: Cross multiply
    191,446.84x = 287,170.32 × 86,142.79
  4. Step 4: Simplify right side
    191,446.84x = 24,737,651,134.14
  5. Step 5: Solve for x
    x = 24,737,651,134.14/191,446.84
  6. Step 6: Final answer
    x = 129,214.21

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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.