Home / 128,954.80-193,432.20-40,207.60

Finding the Fourth Proportional to 128,954.80, 193,432.20 and 40,207.60

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Solution

The fourth proportional to 128,954.80, 193,432.20 and 40,207.60 is: 60,311.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,954.80 : 193,432.20 = 40,207.60 : x
  2. Step 2: Convert to fraction form
    128,954.80/193,432.20 = 40,207.60/x
  3. Step 3: Cross multiply
    128,954.80x = 193,432.20 × 40,207.60
  4. Step 4: Simplify right side
    128,954.80x = 7,777,444,524.72
  5. Step 5: Solve for x
    x = 7,777,444,524.72/128,954.80
  6. Step 6: Final answer
    x = 60,311.40

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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.