Home / 79,939.41-119,909.47-20,770.89

Finding the Fourth Proportional to 79,939.41, 119,909.47 and 20,770.89

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Solution

The fourth proportional to 79,939.41, 119,909.47 and 20,770.89 is: 31,156.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,939.41 : 119,909.47 = 20,770.89 : x
  2. Step 2: Convert to fraction form
    79,939.41/119,909.47 = 20,770.89/x
  3. Step 3: Cross multiply
    79,939.41x = 119,909.47 × 20,770.89
  4. Step 4: Simplify right side
    79,939.41x = 2,490,626,411.33
  5. Step 5: Solve for x
    x = 2,490,626,411.33/79,939.41
  6. Step 6: Final answer
    x = 31,156.43

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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.