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Finding the Fourth Proportional to 136,495.87, 188,361.72 and 76,065.21

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Solution

The fourth proportional to 136,495.87, 188,361.72 and 76,065.21 is: 104,968.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,495.87 : 188,361.72 = 76,065.21 : x
  2. Step 2: Convert to fraction form
    136,495.87/188,361.72 = 76,065.21/x
  3. Step 3: Cross multiply
    136,495.87x = 188,361.72 × 76,065.21
  4. Step 4: Simplify right side
    136,495.87x = 14,327,773,787.76
  5. Step 5: Solve for x
    x = 14,327,773,787.76/136,495.87
  6. Step 6: Final answer
    x = 104,968.55

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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.