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Finding the Fourth Proportional to 146,411.80, 219,617.70 and 86,536.60

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Solution

The fourth proportional to 146,411.80, 219,617.70 and 86,536.60 is: 129,804.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    146,411.80 : 219,617.70 = 86,536.60 : x
  2. Step 2: Convert to fraction form
    146,411.80/219,617.70 = 86,536.60/x
  3. Step 3: Cross multiply
    146,411.80x = 219,617.70 × 86,536.60
  4. Step 4: Simplify right side
    146,411.80x = 19,004,969,057.82
  5. Step 5: Solve for x
    x = 19,004,969,057.82/146,411.80
  6. Step 6: Final answer
    x = 129,804.90

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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.