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Finding the Fourth Proportional to 251,488.40, 347,046.93 and 138,311.15

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Solution

The fourth proportional to 251,488.40, 347,046.93 and 138,311.15 is: 190,865.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,488.40 : 347,046.93 = 138,311.15 : x
  2. Step 2: Convert to fraction form
    251,488.40/347,046.93 = 138,311.15/x
  3. Step 3: Cross multiply
    251,488.40x = 347,046.93 × 138,311.15
  4. Step 4: Simplify right side
    251,488.40x = 48,000,458,257.03
  5. Step 5: Solve for x
    x = 48,000,458,257.03/251,488.40
  6. Step 6: Final answer
    x = 190,865.50

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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.