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Finding the Fourth Proportional to 92,694.96, 138,371.10 and 81,485.04

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Solution

The fourth proportional to 92,694.96, 138,371.10 and 81,485.04 is: 121,637.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,694.96 : 138,371.10 = 81,485.04 : x
  2. Step 2: Convert to fraction form
    92,694.96/138,371.10 = 81,485.04/x
  3. Step 3: Cross multiply
    92,694.96x = 138,371.10 × 81,485.04
  4. Step 4: Simplify right side
    92,694.96x = 11,275,174,618.34
  5. Step 5: Solve for x
    x = 11,275,174,618.34/92,694.96
  6. Step 6: Final answer
    x = 121,637.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.