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Finding the Fourth Proportional to 78,198.91, 107,904.82 and 55,529.64

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Solution

The fourth proportional to 78,198.91, 107,904.82 and 55,529.64 is: 76,624.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,198.91 : 107,904.82 = 55,529.64 : x
  2. Step 2: Convert to fraction form
    78,198.91/107,904.82 = 55,529.64/x
  3. Step 3: Cross multiply
    78,198.91x = 107,904.82 × 55,529.64
  4. Step 4: Simplify right side
    78,198.91x = 5,991,915,808.86
  5. Step 5: Solve for x
    x = 5,991,915,808.86/78,198.91
  6. Step 6: Final answer
    x = 76,624.03

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1.5x scale

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.