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Finding the Fourth Proportional to 138,466.56, 190,958.40 and 90,702.48

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Solution

The fourth proportional to 138,466.56, 190,958.40 and 90,702.48 is: 125,087.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,466.56 : 190,958.40 = 90,702.48 : x
  2. Step 2: Convert to fraction form
    138,466.56/190,958.40 = 90,702.48/x
  3. Step 3: Cross multiply
    138,466.56x = 190,958.40 × 90,702.48
  4. Step 4: Simplify right side
    138,466.56x = 17,320,400,456.83
  5. Step 5: Solve for x
    x = 17,320,400,456.83/138,466.56
  6. Step 6: Final answer
    x = 125,087.24

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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.