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Finding the Fourth Proportional to 155,029.44, 213,904.08 and 87,961.44

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Solution

The fourth proportional to 155,029.44, 213,904.08 and 87,961.44 is: 121,366.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,029.44 : 213,904.08 = 87,961.44 : x
  2. Step 2: Convert to fraction form
    155,029.44/213,904.08 = 87,961.44/x
  3. Step 3: Cross multiply
    155,029.44x = 213,904.08 × 87,961.44
  4. Step 4: Simplify right side
    155,029.44x = 18,815,310,898.68
  5. Step 5: Solve for x
    x = 18,815,310,898.68/155,029.44
  6. Step 6: Final answer
    x = 121,366.05

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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.