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Finding the Fourth Proportional to 86,560.37, 129,854.91 and 30,385.91

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Solution

The fourth proportional to 86,560.37, 129,854.91 and 30,385.91 is: 45,583.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,560.37 : 129,854.91 = 30,385.91 : x
  2. Step 2: Convert to fraction form
    86,560.37/129,854.91 = 30,385.91/x
  3. Step 3: Cross multiply
    86,560.37x = 129,854.91 × 30,385.91
  4. Step 4: Simplify right side
    86,560.37x = 3,945,759,608.32
  5. Step 5: Solve for x
    x = 3,945,759,608.32/86,560.37
  6. Step 6: Final answer
    x = 45,583.90

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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.