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Finding the Fourth Proportional to 191,609.40, 287,414.10 and 66,934.20

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Solution

The fourth proportional to 191,609.40, 287,414.10 and 66,934.20 is: 100,401.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,609.40 : 287,414.10 = 66,934.20 : x
  2. Step 2: Convert to fraction form
    191,609.40/287,414.10 = 66,934.20/x
  3. Step 3: Cross multiply
    191,609.40x = 287,414.10 × 66,934.20
  4. Step 4: Simplify right side
    191,609.40x = 19,237,832,852.22
  5. Step 5: Solve for x
    x = 19,237,832,852.22/191,609.40
  6. Step 6: Final answer
    x = 100,401.30

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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.