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Finding the Fourth Proportional to 61,139.91, 91,850.60 and 43,169.65

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Solution

The fourth proportional to 61,139.91, 91,850.60 and 43,169.65 is: 64,853.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,139.91 : 91,850.60 = 43,169.65 : x
  2. Step 2: Convert to fraction form
    61,139.91/91,850.60 = 43,169.65/x
  3. Step 3: Cross multiply
    61,139.91x = 91,850.60 × 43,169.65
  4. Step 4: Simplify right side
    61,139.91x = 3,965,158,254.29
  5. Step 5: Solve for x
    x = 3,965,158,254.29/61,139.91
  6. Step 6: Final answer
    x = 64,853.85

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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.