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Finding the Fourth Proportional to 65,936.48, 90,992.40 and 36,128.48

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Solution

The fourth proportional to 65,936.48, 90,992.40 and 36,128.48 is: 49,857.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,936.48 : 90,992.40 = 36,128.48 : x
  2. Step 2: Convert to fraction form
    65,936.48/90,992.40 = 36,128.48/x
  3. Step 3: Cross multiply
    65,936.48x = 90,992.40 × 36,128.48
  4. Step 4: Simplify right side
    65,936.48x = 3,287,417,103.55
  5. Step 5: Solve for x
    x = 3,287,417,103.55/65,936.48
  6. Step 6: Final answer
    x = 49,857.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.