Home / 129,046.84-178,149.40-80,675.64

Finding the Fourth Proportional to 129,046.84, 178,149.40 and 80,675.64

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Solution

The fourth proportional to 129,046.84, 178,149.40 and 80,675.64 is: 111,372.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,046.84 : 178,149.40 = 80,675.64 : x
  2. Step 2: Convert to fraction form
    129,046.84/178,149.40 = 80,675.64/x
  3. Step 3: Cross multiply
    129,046.84x = 178,149.40 × 80,675.64
  4. Step 4: Simplify right side
    129,046.84x = 14,372,316,860.62
  5. Step 5: Solve for x
    x = 14,372,316,860.62/129,046.84
  6. Step 6: Final answer
    x = 111,372.87

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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.