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Finding the Fourth Proportional to 380,121.12, 570,137.84 and 99,660.64

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Solution

The fourth proportional to 380,121.12, 570,137.84 and 99,660.64 is: 149,479.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,121.12 : 570,137.84 = 99,660.64 : x
  2. Step 2: Convert to fraction form
    380,121.12/570,137.84 = 99,660.64/x
  3. Step 3: Cross multiply
    380,121.12x = 570,137.84 × 99,660.64
  4. Step 4: Simplify right side
    380,121.12x = 56,820,302,022.62
  5. Step 5: Solve for x
    x = 56,820,302,022.62/380,121.12
  6. Step 6: Final answer
    x = 149,479.47

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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.