Home / 85,839.72-128,736.20-35,911.73

Finding the Fourth Proportional to 85,839.72, 128,736.20 and 35,911.73

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Solution

The fourth proportional to 85,839.72, 128,736.20 and 35,911.73 is: 53,857.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,839.72 : 128,736.20 = 35,911.73 : x
  2. Step 2: Convert to fraction form
    85,839.72/128,736.20 = 35,911.73/x
  3. Step 3: Cross multiply
    85,839.72x = 128,736.20 × 35,911.73
  4. Step 4: Simplify right side
    85,839.72x = 4,623,138,832.39
  5. Step 5: Solve for x
    x = 4,623,138,832.39/85,839.72
  6. Step 6: Final answer
    x = 53,857.80

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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.