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Finding the Fourth Proportional to 57,403, 86,118.30 and 19,957.60

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Solution

The fourth proportional to 57,403, 86,118.30 and 19,957.60 is: 29,941.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,403 : 86,118.30 = 19,957.60 : x
  2. Step 2: Convert to fraction form
    57,403/86,118.30 = 19,957.60/x
  3. Step 3: Cross multiply
    57,403x = 86,118.30 × 19,957.60
  4. Step 4: Simplify right side
    57,403x = 1,718,714,584.08
  5. Step 5: Solve for x
    x = 1,718,714,584.08/57,403
  6. Step 6: Final answer
    x = 29,941.20

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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.