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Finding the Fourth Proportional to 92,549.21, 138,879.32 and 39,958.65

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Solution

The fourth proportional to 92,549.21, 138,879.32 and 39,958.65 is: 59,961.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,549.21 : 138,879.32 = 39,958.65 : x
  2. Step 2: Convert to fraction form
    92,549.21/138,879.32 = 39,958.65/x
  3. Step 3: Cross multiply
    92,549.21x = 138,879.32 × 39,958.65
  4. Step 4: Simplify right side
    92,549.21x = 5,549,429,940.32
  5. Step 5: Solve for x
    x = 5,549,429,940.32/92,549.21
  6. Step 6: Final answer
    x = 59,961.94

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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.