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Finding the Fourth Proportional to 85,392.43, 128,105.06 and 29,241.21

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Solution

The fourth proportional to 85,392.43, 128,105.06 and 29,241.21 is: 43,867.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,392.43 : 128,105.06 = 29,241.21 : x
  2. Step 2: Convert to fraction form
    85,392.43/128,105.06 = 29,241.21/x
  3. Step 3: Cross multiply
    85,392.43x = 128,105.06 × 29,241.21
  4. Step 4: Simplify right side
    85,392.43x = 3,745,946,961.52
  5. Step 5: Solve for x
    x = 3,745,946,961.52/85,392.43
  6. Step 6: Final answer
    x = 43,867.44

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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.