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Finding the Fourth Proportional to 138,466.39, 190,980.97 and 88,181.59

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Solution

The fourth proportional to 138,466.39, 190,980.97 and 88,181.59 is: 121,625.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,466.39 : 190,980.97 = 88,181.59 : x
  2. Step 2: Convert to fraction form
    138,466.39/190,980.97 = 88,181.59/x
  3. Step 3: Cross multiply
    138,466.39x = 190,980.97 × 88,181.59
  4. Step 4: Simplify right side
    138,466.39x = 16,841,005,594.34
  5. Step 5: Solve for x
    x = 16,841,005,594.34/138,466.39
  6. Step 6: Final answer
    x = 121,625.22

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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.