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Finding the Fourth Proportional to 251,479.72, 347,048.58 and 138,305.44

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Solution

The fourth proportional to 251,479.72, 347,048.58 and 138,305.44 is: 190,865.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,479.72 : 347,048.58 = 138,305.44 : x
  2. Step 2: Convert to fraction form
    251,479.72/347,048.58 = 138,305.44/x
  3. Step 3: Cross multiply
    251,479.72x = 347,048.58 × 138,305.44
  4. Step 4: Simplify right side
    251,479.72x = 47,998,706,558.28
  5. Step 5: Solve for x
    x = 47,998,706,558.28/251,479.72
  6. Step 6: Final answer
    x = 190,865.12

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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.