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Finding the Fourth Proportional to 86,000.98, 128,979.60 and 33,381.76

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Solution

The fourth proportional to 86,000.98, 128,979.60 and 33,381.76 is: 50,064.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,000.98 : 128,979.60 = 33,381.76 : x
  2. Step 2: Convert to fraction form
    86,000.98/128,979.60 = 33,381.76/x
  3. Step 3: Cross multiply
    86,000.98x = 128,979.60 × 33,381.76
  4. Step 4: Simplify right side
    86,000.98x = 4,305,566,052.10
  5. Step 5: Solve for x
    x = 4,305,566,052.10/86,000.98
  6. Step 6: Final answer
    x = 50,064.15

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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.