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Finding the Fourth Proportional to 79,715.80, 109,887.64 and 65,544.04

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Solution

The fourth proportional to 79,715.80, 109,887.64 and 65,544.04 is: 90,351.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,715.80 : 109,887.64 = 65,544.04 : x
  2. Step 2: Convert to fraction form
    79,715.80/109,887.64 = 65,544.04/x
  3. Step 3: Cross multiply
    79,715.80x = 109,887.64 × 65,544.04
  4. Step 4: Simplify right side
    79,715.80x = 7,202,479,871.67
  5. Step 5: Solve for x
    x = 7,202,479,871.67/79,715.80
  6. Step 6: Final answer
    x = 90,351.97

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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.