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Finding the Fourth Proportional to 79,659.48, 109,868.68 and 49,462.68

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Solution

The fourth proportional to 79,659.48, 109,868.68 and 49,462.68 is: 68,220.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,659.48 : 109,868.68 = 49,462.68 : x
  2. Step 2: Convert to fraction form
    79,659.48/109,868.68 = 49,462.68/x
  3. Step 3: Cross multiply
    79,659.48x = 109,868.68 × 49,462.68
  4. Step 4: Simplify right side
    79,659.48x = 5,434,399,360.86
  5. Step 5: Solve for x
    x = 5,434,399,360.86/79,659.48
  6. Step 6: Final answer
    x = 68,220.37

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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.