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Finding the Fourth Proportional to 61,992.69, 85,470.72 and 40,150.38

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Solution

The fourth proportional to 61,992.69, 85,470.72 and 40,150.38 is: 55,356.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,992.69 : 85,470.72 = 40,150.38 : x
  2. Step 2: Convert to fraction form
    61,992.69/85,470.72 = 40,150.38/x
  3. Step 3: Cross multiply
    61,992.69x = 85,470.72 × 40,150.38
  4. Step 4: Simplify right side
    61,992.69x = 3,431,681,786.50
  5. Step 5: Solve for x
    x = 3,431,681,786.50/61,992.69
  6. Step 6: Final answer
    x = 55,356.24

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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.