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Finding the Fourth Proportional to 149,393.30, 206,162.76 and 81,410.28

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Solution

The fourth proportional to 149,393.30, 206,162.76 and 81,410.28 is: 112,346.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,393.30 : 206,162.76 = 81,410.28 : x
  2. Step 2: Convert to fraction form
    149,393.30/206,162.76 = 81,410.28/x
  3. Step 3: Cross multiply
    149,393.30x = 206,162.76 × 81,410.28
  4. Step 4: Simplify right side
    149,393.30x = 16,783,768,017.17
  5. Step 5: Solve for x
    x = 16,783,768,017.17/149,393.30
  6. Step 6: Final answer
    x = 112,346.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.