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Finding the Fourth Proportional to 251,486.56, 347,058.72 and 138,316.60

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Solution

The fourth proportional to 251,486.56, 347,058.72 and 138,316.60 is: 190,880.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,486.56 : 347,058.72 = 138,316.60 : x
  2. Step 2: Convert to fraction form
    251,486.56/347,058.72 = 138,316.60/x
  3. Step 3: Cross multiply
    251,486.56x = 347,058.72 × 138,316.60
  4. Step 4: Simplify right side
    251,486.56x = 48,003,982,150.75
  5. Step 5: Solve for x
    x = 48,003,982,150.75/251,486.56
  6. Step 6: Final answer
    x = 190,880.90

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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.