Home / 129,344.48-178,491.69-71,982.89

Finding the Fourth Proportional to 129,344.48, 178,491.69 and 71,982.89

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Solution

The fourth proportional to 129,344.48, 178,491.69 and 71,982.89 is: 99,334.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,344.48 : 178,491.69 = 71,982.89 : x
  2. Step 2: Convert to fraction form
    129,344.48/178,491.69 = 71,982.89/x
  3. Step 3: Cross multiply
    129,344.48x = 178,491.69 × 71,982.89
  4. Step 4: Simplify right side
    129,344.48x = 12,848,347,687.18
  5. Step 5: Solve for x
    x = 12,848,347,687.18/129,344.48
  6. Step 6: Final answer
    x = 99,334.33

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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.