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Finding the Fourth Proportional to 85,873.54, 128,810.64 and 35,918.60

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Solution

The fourth proportional to 85,873.54, 128,810.64 and 35,918.60 is: 53,878.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,873.54 : 128,810.64 = 35,918.60 : x
  2. Step 2: Convert to fraction form
    85,873.54/128,810.64 = 35,918.60/x
  3. Step 3: Cross multiply
    85,873.54x = 128,810.64 × 35,918.60
  4. Step 4: Simplify right side
    85,873.54x = 4,626,697,853.90
  5. Step 5: Solve for x
    x = 4,626,697,853.90/85,873.54
  6. Step 6: Final answer
    x = 53,878.04

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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.