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Finding the Fourth Proportional to 85,598.36, 128,427.90 and 38,209.12

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Solution

The fourth proportional to 85,598.36, 128,427.90 and 38,209.12 is: 57,327.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,598.36 : 128,427.90 = 38,209.12 : x
  2. Step 2: Convert to fraction form
    85,598.36/128,427.90 = 38,209.12/x
  3. Step 3: Cross multiply
    85,598.36x = 128,427.90 × 38,209.12
  4. Step 4: Simplify right side
    85,598.36x = 4,907,117,042.45
  5. Step 5: Solve for x
    x = 4,907,117,042.45/85,598.36
  6. Step 6: Final answer
    x = 57,327.23

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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.