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Finding the Fourth Proportional to 129,176.89, 178,267.17 and 71,817.96

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Solution

The fourth proportional to 129,176.89, 178,267.17 and 71,817.96 is: 99,110.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,176.89 : 178,267.17 = 71,817.96 : x
  2. Step 2: Convert to fraction form
    129,176.89/178,267.17 = 71,817.96/x
  3. Step 3: Cross multiply
    129,176.89x = 178,267.17 × 71,817.96
  4. Step 4: Simplify right side
    129,176.89x = 12,802,784,484.37
  5. Step 5: Solve for x
    x = 12,802,784,484.37/129,176.89
  6. Step 6: Final answer
    x = 99,110.49

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.