Home / 78,436.68-108,168.12-51,601.92

Finding the Fourth Proportional to 78,436.68, 108,168.12 and 51,601.92

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Solution

The fourth proportional to 78,436.68, 108,168.12 and 51,601.92 is: 71,161.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,436.68 : 108,168.12 = 51,601.92 : x
  2. Step 2: Convert to fraction form
    78,436.68/108,168.12 = 51,601.92/x
  3. Step 3: Cross multiply
    78,436.68x = 108,168.12 × 51,601.92
  4. Step 4: Simplify right side
    78,436.68x = 5,581,682,674.79
  5. Step 5: Solve for x
    x = 5,581,682,674.79/78,436.68
  6. Step 6: Final answer
    x = 71,161.64

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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.