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Finding the Fourth Proportional to 251,909.30, 347,632.53 and 138,729.62

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Solution

The fourth proportional to 251,909.30, 347,632.53 and 138,729.62 is: 191,445.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,909.30 : 347,632.53 = 138,729.62 : x
  2. Step 2: Convert to fraction form
    251,909.30/347,632.53 = 138,729.62/x
  3. Step 3: Cross multiply
    251,909.30x = 347,632.53 × 138,729.62
  4. Step 4: Simplify right side
    251,909.30x = 48,226,928,786.54
  5. Step 5: Solve for x
    x = 48,226,928,786.54/251,909.30
  6. Step 6: Final answer
    x = 191,445.61

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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.