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Finding the Fourth Proportional to 85,391.64, 127,999.95 and 35,500.68

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Solution

The fourth proportional to 85,391.64, 127,999.95 and 35,500.68 is: 53,214.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,391.64 : 127,999.95 = 35,500.68 : x
  2. Step 2: Convert to fraction form
    85,391.64/127,999.95 = 35,500.68/x
  3. Step 3: Cross multiply
    85,391.64x = 127,999.95 × 35,500.68
  4. Step 4: Simplify right side
    85,391.64x = 4,544,085,264.97
  5. Step 5: Solve for x
    x = 4,544,085,264.97/85,391.64
  6. Step 6: Final answer
    x = 53,214.64

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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.