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Finding the Fourth Proportional to 251,529.78, 347,103.86 and 138,352.54

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Solution

The fourth proportional to 251,529.78, 347,103.86 and 138,352.54 is: 190,922.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,529.78 : 347,103.86 = 138,352.54 : x
  2. Step 2: Convert to fraction form
    251,529.78/347,103.86 = 138,352.54/x
  3. Step 3: Cross multiply
    251,529.78x = 347,103.86 × 138,352.54
  4. Step 4: Simplify right side
    251,529.78x = 48,022,700,674.80
  5. Step 5: Solve for x
    x = 48,022,700,674.80/251,529.78
  6. Step 6: Final answer
    x = 190,922.52

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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.