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Finding the Fourth Proportional to 251,991.12, 347,687.28 and 143,071.32

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Solution

The fourth proportional to 251,991.12, 347,687.28 and 143,071.32 is: 197,404.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,991.12 : 347,687.28 = 143,071.32 : x
  2. Step 2: Convert to fraction form
    251,991.12/347,687.28 = 143,071.32/x
  3. Step 3: Cross multiply
    251,991.12x = 347,687.28 × 143,071.32
  4. Step 4: Simplify right side
    251,991.12x = 49,744,078,096.81
  5. Step 5: Solve for x
    x = 49,744,078,096.81/251,991.12
  6. Step 6: Final answer
    x = 197,404.09

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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.