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Finding the Fourth Proportional to 251,876, 347,588.88 and 138,698.48

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Solution

The fourth proportional to 251,876, 347,588.88 and 138,698.48 is: 191,403.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,876 : 347,588.88 = 138,698.48 : x
  2. Step 2: Convert to fraction form
    251,876/347,588.88 = 138,698.48/x
  3. Step 3: Cross multiply
    251,876x = 347,588.88 × 138,698.48
  4. Step 4: Simplify right side
    251,876x = 48,210,049,320.90
  5. Step 5: Solve for x
    x = 48,210,049,320.90/251,876
  6. Step 6: Final answer
    x = 191,403.90

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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.