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Finding the Fourth Proportional to 92,081.64, 138,196.28 and 47,721.08

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Solution

The fourth proportional to 92,081.64, 138,196.28 and 47,721.08 is: 71,619.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,081.64 : 138,196.28 = 47,721.08 : x
  2. Step 2: Convert to fraction form
    92,081.64/138,196.28 = 47,721.08/x
  3. Step 3: Cross multiply
    92,081.64x = 138,196.28 × 47,721.08
  4. Step 4: Simplify right side
    92,081.64x = 6,594,876,198.38
  5. Step 5: Solve for x
    x = 6,594,876,198.38/92,081.64
  6. Step 6: Final answer
    x = 71,619.88

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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.