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Finding the Fourth Proportional to 128,920.32, 193,263.84 and 45,794.88

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Solution

The fourth proportional to 128,920.32, 193,263.84 and 45,794.88 is: 68,650.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,920.32 : 193,263.84 = 45,794.88 : x
  2. Step 2: Convert to fraction form
    128,920.32/193,263.84 = 45,794.88/x
  3. Step 3: Cross multiply
    128,920.32x = 193,263.84 × 45,794.88
  4. Step 4: Simplify right side
    128,920.32x = 8,850,494,361.14
  5. Step 5: Solve for x
    x = 8,850,494,361.14/128,920.32
  6. Step 6: Final answer
    x = 68,650.89

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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.