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Finding the Fourth Proportional to 79,604.80, 119,666.40 and 74,939.20

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Solution

The fourth proportional to 79,604.80, 119,666.40 and 74,939.20 is: 112,652.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,604.80 : 119,666.40 = 74,939.20 : x
  2. Step 2: Convert to fraction form
    79,604.80/119,666.40 = 74,939.20/x
  3. Step 3: Cross multiply
    79,604.80x = 119,666.40 × 74,939.20
  4. Step 4: Simplify right side
    79,604.80x = 8,967,704,282.88
  5. Step 5: Solve for x
    x = 8,967,704,282.88/79,604.80
  6. Step 6: Final answer
    x = 112,652.81

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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.