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Finding the Fourth Proportional to 79,430.45, 109,540.89 and 53,974.98

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Solution

The fourth proportional to 79,430.45, 109,540.89 and 53,974.98 is: 74,435.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,430.45 : 109,540.89 = 53,974.98 : x
  2. Step 2: Convert to fraction form
    79,430.45/109,540.89 = 53,974.98/x
  3. Step 3: Cross multiply
    79,430.45x = 109,540.89 × 53,974.98
  4. Step 4: Simplify right side
    79,430.45x = 5,912,467,346.93
  5. Step 5: Solve for x
    x = 5,912,467,346.93/79,430.45
  6. Step 6: Final answer
    x = 74,435.78

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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.