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Finding the Fourth Proportional to 85,391.76, 128,032.80 and 35,506.56

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Solution

The fourth proportional to 85,391.76, 128,032.80 and 35,506.56 is: 53,237.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,391.76 : 128,032.80 = 35,506.56 : x
  2. Step 2: Convert to fraction form
    85,391.76/128,032.80 = 35,506.56/x
  3. Step 3: Cross multiply
    85,391.76x = 128,032.80 × 35,506.56
  4. Step 4: Simplify right side
    85,391.76x = 4,546,004,295.17
  5. Step 5: Solve for x
    x = 4,546,004,295.17/85,391.76
  6. Step 6: Final answer
    x = 53,237.04

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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.