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Finding the Fourth Proportional to 101,829.66, 140,586.75 and 79,125.77

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Solution

The fourth proportional to 101,829.66, 140,586.75 and 79,125.77 is: 109,241.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,829.66 : 140,586.75 = 79,125.77 : x
  2. Step 2: Convert to fraction form
    101,829.66/140,586.75 = 79,125.77/x
  3. Step 3: Cross multiply
    101,829.66x = 140,586.75 × 79,125.77
  4. Step 4: Simplify right side
    101,829.66x = 11,124,034,142.61
  5. Step 5: Solve for x
    x = 11,124,034,142.61/101,829.66
  6. Step 6: Final answer
    x = 109,241.59

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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.