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Finding the Fourth Proportional to 124,998.31, 172,334.81 and 79,659.75

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Solution

The fourth proportional to 124,998.31, 172,334.81 and 79,659.75 is: 109,826.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,998.31 : 172,334.81 = 79,659.75 : x
  2. Step 2: Convert to fraction form
    124,998.31/172,334.81 = 79,659.75/x
  3. Step 3: Cross multiply
    124,998.31x = 172,334.81 × 79,659.75
  4. Step 4: Simplify right side
    124,998.31x = 13,728,146,620.92
  5. Step 5: Solve for x
    x = 13,728,146,620.92/124,998.31
  6. Step 6: Final answer
    x = 109,826.66

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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.