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Finding the Fourth Proportional to 72,107.61, 108,189.10 and 50,780.78

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Solution

The fourth proportional to 72,107.61, 108,189.10 and 50,780.78 is: 76,190.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,107.61 : 108,189.10 = 50,780.78 : x
  2. Step 2: Convert to fraction form
    72,107.61/108,189.10 = 50,780.78/x
  3. Step 3: Cross multiply
    72,107.61x = 108,189.10 × 50,780.78
  4. Step 4: Simplify right side
    72,107.61x = 5,493,926,813.74
  5. Step 5: Solve for x
    x = 5,493,926,813.74/72,107.61
  6. Step 6: Final answer
    x = 76,190.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.