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Finding the Fourth Proportional to 66,606.61, 91,916.04 and 36,391.28

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Solution

The fourth proportional to 66,606.61, 91,916.04 and 36,391.28 is: 50,219.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,606.61 : 91,916.04 = 36,391.28 : x
  2. Step 2: Convert to fraction form
    66,606.61/91,916.04 = 36,391.28/x
  3. Step 3: Cross multiply
    66,606.61x = 91,916.04 × 36,391.28
  4. Step 4: Simplify right side
    66,606.61x = 3,344,942,441.45
  5. Step 5: Solve for x
    x = 3,344,942,441.45/66,606.61
  6. Step 6: Final answer
    x = 50,219.38

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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.