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Finding the Fourth Proportional to 86,000.43, 128,967.42 and 33,402.81

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Solution

The fourth proportional to 86,000.43, 128,967.42 and 33,402.81 is: 50,091.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,000.43 : 128,967.42 = 33,402.81 : x
  2. Step 2: Convert to fraction form
    86,000.43/128,967.42 = 33,402.81/x
  3. Step 3: Cross multiply
    86,000.43x = 128,967.42 × 33,402.81
  4. Step 4: Simplify right side
    86,000.43x = 4,307,874,226.45
  5. Step 5: Solve for x
    x = 4,307,874,226.45/86,000.43
  6. Step 6: Final answer
    x = 50,091.31

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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.