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Finding the Fourth Proportional to 136,874.90, 188,885.32 and 76,446.56

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Solution

The fourth proportional to 136,874.90, 188,885.32 and 76,446.56 is: 105,495.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,874.90 : 188,885.32 = 76,446.56 : x
  2. Step 2: Convert to fraction form
    136,874.90/188,885.32 = 76,446.56/x
  3. Step 3: Cross multiply
    136,874.90x = 188,885.32 × 76,446.56
  4. Step 4: Simplify right side
    136,874.90x = 14,439,631,812.96
  5. Step 5: Solve for x
    x = 14,439,631,812.96/136,874.90
  6. Step 6: Final answer
    x = 105,495.11

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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.