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Finding the Fourth Proportional to 66,442.72, 91,713.17 and 39,593.65

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Solution

The fourth proportional to 66,442.72, 91,713.17 and 39,593.65 is: 54,652.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,442.72 : 91,713.17 = 39,593.65 : x
  2. Step 2: Convert to fraction form
    66,442.72/91,713.17 = 39,593.65/x
  3. Step 3: Cross multiply
    66,442.72x = 91,713.17 × 39,593.65
  4. Step 4: Simplify right side
    66,442.72x = 3,631,258,496.84
  5. Step 5: Solve for x
    x = 3,631,258,496.84/66,442.72
  6. Step 6: Final answer
    x = 54,652.47

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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.