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Finding the Fourth Proportional to 138,005.60, 206,989.20 and 44,520.80

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Solution

The fourth proportional to 138,005.60, 206,989.20 and 44,520.80 is: 66,775.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,005.60 : 206,989.20 = 44,520.80 : x
  2. Step 2: Convert to fraction form
    138,005.60/206,989.20 = 44,520.80/x
  3. Step 3: Cross multiply
    138,005.60x = 206,989.20 × 44,520.80
  4. Step 4: Simplify right side
    138,005.60x = 9,215,324,775.36
  5. Step 5: Solve for x
    x = 9,215,324,775.36/138,005.60
  6. Step 6: Final answer
    x = 66,775.01

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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.