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Finding the Fourth Proportional to 79,438.80, 119,158.09 and 20,274.46

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Solution

The fourth proportional to 79,438.80, 119,158.09 and 20,274.46 is: 30,411.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,438.80 : 119,158.09 = 20,274.46 : x
  2. Step 2: Convert to fraction form
    79,438.80/119,158.09 = 20,274.46/x
  3. Step 3: Cross multiply
    79,438.80x = 119,158.09 × 20,274.46
  4. Step 4: Simplify right side
    79,438.80x = 2,415,865,929.38
  5. Step 5: Solve for x
    x = 2,415,865,929.38/79,438.80
  6. Step 6: Final answer
    x = 30,411.66

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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.