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Finding the Fourth Proportional to 55,791.47, 76,992.17 and 30,640.97

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Solution

The fourth proportional to 55,791.47, 76,992.17 and 30,640.97 is: 42,284.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,791.47 : 76,992.17 = 30,640.97 : x
  2. Step 2: Convert to fraction form
    55,791.47/76,992.17 = 30,640.97/x
  3. Step 3: Cross multiply
    55,791.47x = 76,992.17 × 30,640.97
  4. Step 4: Simplify right side
    55,791.47x = 2,359,114,233.04
  5. Step 5: Solve for x
    x = 2,359,114,233.04/55,791.47
  6. Step 6: Final answer
    x = 42,284.50

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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.