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Finding the Fourth Proportional to 251,487.72, 347,059.62 and 138,313.44

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Solution

The fourth proportional to 251,487.72, 347,059.62 and 138,313.44 is: 190,876.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,487.72 : 347,059.62 = 138,313.44 : x
  2. Step 2: Convert to fraction form
    251,487.72/347,059.62 = 138,313.44/x
  3. Step 3: Cross multiply
    251,487.72x = 347,059.62 × 138,313.44
  4. Step 4: Simplify right side
    251,487.72x = 48,003,009,927.29
  5. Step 5: Solve for x
    x = 48,003,009,927.29/251,487.72
  6. Step 6: Final answer
    x = 190,876.16

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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.