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Finding the Fourth Proportional to 128,838.76, 193,256.34 and 44,660.20

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Solution

The fourth proportional to 128,838.76, 193,256.34 and 44,660.20 is: 66,989.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,838.76 : 193,256.34 = 44,660.20 : x
  2. Step 2: Convert to fraction form
    128,838.76/193,256.34 = 44,660.20/x
  3. Step 3: Cross multiply
    128,838.76x = 193,256.34 × 44,660.20
  4. Step 4: Simplify right side
    128,838.76x = 8,630,866,795.67
  5. Step 5: Solve for x
    x = 8,630,866,795.67/128,838.76
  6. Step 6: Final answer
    x = 66,989.68

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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.