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Finding the Fourth Proportional to 77,005.40, 115,383.90 and 43,626.20

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Solution

The fourth proportional to 77,005.40, 115,383.90 and 43,626.20 is: 65,368.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,005.40 : 115,383.90 = 43,626.20 : x
  2. Step 2: Convert to fraction form
    77,005.40/115,383.90 = 43,626.20/x
  3. Step 3: Cross multiply
    77,005.40x = 115,383.90 × 43,626.20
  4. Step 4: Simplify right side
    77,005.40x = 5,033,761,098.18
  5. Step 5: Solve for x
    x = 5,033,761,098.18/77,005.40
  6. Step 6: Final answer
    x = 65,368.94

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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.