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Finding the Fourth Proportional to 108,958.69, 150,015.40 and 92,979.01

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Solution

The fourth proportional to 108,958.69, 150,015.40 and 92,979.01 is: 128,014.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,958.69 : 150,015.40 = 92,979.01 : x
  2. Step 2: Convert to fraction form
    108,958.69/150,015.40 = 92,979.01/x
  3. Step 3: Cross multiply
    108,958.69x = 150,015.40 × 92,979.01
  4. Step 4: Simplify right side
    108,958.69x = 13,948,283,376.75
  5. Step 5: Solve for x
    x = 13,948,283,376.75/108,958.69
  6. Step 6: Final answer
    x = 128,014.42

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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.