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Finding the Fourth Proportional to 251,860, 347,566.80 and 138,682.48

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Solution

The fourth proportional to 251,860, 347,566.80 and 138,682.48 is: 191,381.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,860 : 347,566.80 = 138,682.48 : x
  2. Step 2: Convert to fraction form
    251,860/347,566.80 = 138,682.48/x
  3. Step 3: Cross multiply
    251,860x = 347,566.80 × 138,682.48
  4. Step 4: Simplify right side
    251,860x = 48,201,425,789.66
  5. Step 5: Solve for x
    x = 48,201,425,789.66/251,860
  6. Step 6: Final answer
    x = 191,381.82

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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.