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Finding the Fourth Proportional to 64,787.85, 89,407.38 and 36,493.53

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Solution

The fourth proportional to 64,787.85, 89,407.38 and 36,493.53 is: 50,361.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,787.85 : 89,407.38 = 36,493.53 : x
  2. Step 2: Convert to fraction form
    64,787.85/89,407.38 = 36,493.53/x
  3. Step 3: Cross multiply
    64,787.85x = 89,407.38 × 36,493.53
  4. Step 4: Simplify right side
    64,787.85x = 3,262,790,721.78
  5. Step 5: Solve for x
    x = 3,262,790,721.78/64,787.85
  6. Step 6: Final answer
    x = 50,361.16

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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.