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Finding the Fourth Proportional to 85,953.80, 128,892.30 and 33,345.80

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Solution

The fourth proportional to 85,953.80, 128,892.30 and 33,345.80 is: 50,003.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,953.80 : 128,892.30 = 33,345.80 : x
  2. Step 2: Convert to fraction form
    85,953.80/128,892.30 = 33,345.80/x
  3. Step 3: Cross multiply
    85,953.80x = 128,892.30 × 33,345.80
  4. Step 4: Simplify right side
    85,953.80x = 4,298,016,857.34
  5. Step 5: Solve for x
    x = 4,298,016,857.34/85,953.80
  6. Step 6: Final answer
    x = 50,003.80

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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.