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Finding the Fourth Proportional to 85,628.81, 128,411.35 and 29,453.15

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Solution

The fourth proportional to 85,628.81, 128,411.35 and 29,453.15 is: 44,168.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,628.81 : 128,411.35 = 29,453.15 : x
  2. Step 2: Convert to fraction form
    85,628.81/128,411.35 = 29,453.15/x
  3. Step 3: Cross multiply
    85,628.81x = 128,411.35 × 29,453.15
  4. Step 4: Simplify right side
    85,628.81x = 3,782,118,753.25
  5. Step 5: Solve for x
    x = 3,782,118,753.25/85,628.81
  6. Step 6: Final answer
    x = 44,168.76

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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.