Home / 129,619.69-178,885.82-71,487.79

Finding the Fourth Proportional to 129,619.69, 178,885.82 and 71,487.79

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Solution

The fourth proportional to 129,619.69, 178,885.82 and 71,487.79 is: 98,659.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,619.69 : 178,885.82 = 71,487.79 : x
  2. Step 2: Convert to fraction form
    129,619.69/178,885.82 = 71,487.79/x
  3. Step 3: Cross multiply
    129,619.69x = 178,885.82 × 71,487.79
  4. Step 4: Simplify right side
    129,619.69x = 12,788,151,576.70
  5. Step 5: Solve for x
    x = 12,788,151,576.70/129,619.69
  6. Step 6: Final answer
    x = 98,659.02

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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.