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Finding the Fourth Proportional to 86,172.40, 129,205.68 and 33,520.52

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Solution

The fourth proportional to 86,172.40, 129,205.68 and 33,520.52 is: 50,260.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,172.40 : 129,205.68 = 33,520.52 : x
  2. Step 2: Convert to fraction form
    86,172.40/129,205.68 = 33,520.52/x
  3. Step 3: Cross multiply
    86,172.40x = 129,205.68 × 33,520.52
  4. Step 4: Simplify right side
    86,172.40x = 4,331,041,580.55
  5. Step 5: Solve for x
    x = 4,331,041,580.55/86,172.40
  6. Step 6: Final answer
    x = 50,260.19

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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.