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Finding the Fourth Proportional to 85,857.80, 128,784.67 and 23,528.30

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Solution

The fourth proportional to 85,857.80, 128,784.67 and 23,528.30 is: 35,291.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,857.80 : 128,784.67 = 23,528.30 : x
  2. Step 2: Convert to fraction form
    85,857.80/128,784.67 = 23,528.30/x
  3. Step 3: Cross multiply
    85,857.80x = 128,784.67 × 23,528.30
  4. Step 4: Simplify right side
    85,857.80x = 3,030,084,351.16
  5. Step 5: Solve for x
    x = 3,030,084,351.16/85,857.80
  6. Step 6: Final answer
    x = 35,291.89

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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.