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Finding the Fourth Proportional to 251,876.50, 347,589.57 and 138,698.98

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Solution

The fourth proportional to 251,876.50, 347,589.57 and 138,698.98 is: 191,404.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,876.50 : 347,589.57 = 138,698.98 : x
  2. Step 2: Convert to fraction form
    251,876.50/347,589.57 = 138,698.98/x
  3. Step 3: Cross multiply
    251,876.50x = 347,589.57 × 138,698.98
  4. Step 4: Simplify right side
    251,876.50x = 48,210,318,817.64
  5. Step 5: Solve for x
    x = 48,210,318,817.64/251,876.50
  6. Step 6: Final answer
    x = 191,404.59

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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.