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Finding the Fourth Proportional to 138,016.48, 190,327.44 and 87,628

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Solution

The fourth proportional to 138,016.48, 190,327.44 and 87,628 is: 120,840.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,016.48 : 190,327.44 = 87,628 : x
  2. Step 2: Convert to fraction form
    138,016.48/190,327.44 = 87,628/x
  3. Step 3: Cross multiply
    138,016.48x = 190,327.44 × 87,628
  4. Step 4: Simplify right side
    138,016.48x = 16,678,012,912.32
  5. Step 5: Solve for x
    x = 16,678,012,912.32/138,016.48
  6. Step 6: Final answer
    x = 120,840.74

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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.