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Finding the Fourth Proportional to 66,787.92, 100,158.84 and 19,390.17

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Solution

The fourth proportional to 66,787.92, 100,158.84 and 19,390.17 is: 29,078.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,787.92 : 100,158.84 = 19,390.17 : x
  2. Step 2: Convert to fraction form
    66,787.92/100,158.84 = 19,390.17/x
  3. Step 3: Cross multiply
    66,787.92x = 100,158.84 × 19,390.17
  4. Step 4: Simplify right side
    66,787.92x = 1,942,096,934.60
  5. Step 5: Solve for x
    x = 1,942,096,934.60/66,787.92
  6. Step 6: Final answer
    x = 29,078.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.