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Finding the Fourth Proportional to 251,976.33, 347,728.28 and 138,798.81

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Solution

The fourth proportional to 251,976.33, 347,728.28 and 138,798.81 is: 191,542.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,976.33 : 347,728.28 = 138,798.81 : x
  2. Step 2: Convert to fraction form
    251,976.33/347,728.28 = 138,798.81/x
  3. Step 3: Cross multiply
    251,976.33x = 347,728.28 × 138,798.81
  4. Step 4: Simplify right side
    251,976.33x = 48,264,270,773.35
  5. Step 5: Solve for x
    x = 48,264,270,773.35/251,976.33
  6. Step 6: Final answer
    x = 191,542.88

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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.