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Finding the Fourth Proportional to 251,863, 347,570.94 and 138,685.48

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Solution

The fourth proportional to 251,863, 347,570.94 and 138,685.48 is: 191,385.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,863 : 347,570.94 = 138,685.48 : x
  2. Step 2: Convert to fraction form
    251,863/347,570.94 = 138,685.48/x
  3. Step 3: Cross multiply
    251,863x = 347,570.94 × 138,685.48
  4. Step 4: Simplify right side
    251,863x = 48,203,042,647.95
  5. Step 5: Solve for x
    x = 48,203,042,647.95/251,863
  6. Step 6: Final answer
    x = 191,385.96

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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.