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Finding the Fourth Proportional to 86,203.70, 129,305.69 and 27,043.91

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Solution

The fourth proportional to 86,203.70, 129,305.69 and 27,043.91 is: 40,565.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,203.70 : 129,305.69 = 27,043.91 : x
  2. Step 2: Convert to fraction form
    86,203.70/129,305.69 = 27,043.91/x
  3. Step 3: Cross multiply
    86,203.70x = 129,305.69 × 27,043.91
  4. Step 4: Simplify right side
    86,203.70x = 3,496,931,442.85
  5. Step 5: Solve for x
    x = 3,496,931,442.85/86,203.70
  6. Step 6: Final answer
    x = 40,565.91

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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.