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Finding the Fourth Proportional to 66,414.65, 99,636.57 and 19,671.17

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Solution

The fourth proportional to 66,414.65, 99,636.57 and 19,671.17 is: 29,511.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,414.65 : 99,636.57 = 19,671.17 : x
  2. Step 2: Convert to fraction form
    66,414.65/99,636.57 = 19,671.17/x
  3. Step 3: Cross multiply
    66,414.65x = 99,636.57 × 19,671.17
  4. Step 4: Simplify right side
    66,414.65x = 1,959,967,408.50
  5. Step 5: Solve for x
    x = 1,959,967,408.50/66,414.65
  6. Step 6: Final answer
    x = 29,511.07

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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.