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Finding the Fourth Proportional to 66,568.88, 91,165.54 and 65,694.08

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Solution

The fourth proportional to 66,568.88, 91,165.54 and 65,694.08 is: 89,967.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,568.88 : 91,165.54 = 65,694.08 : x
  2. Step 2: Convert to fraction form
    66,568.88/91,165.54 = 65,694.08/x
  3. Step 3: Cross multiply
    66,568.88x = 91,165.54 × 65,694.08
  4. Step 4: Simplify right side
    66,568.88x = 5,989,036,278.00
  5. Step 5: Solve for x
    x = 5,989,036,278.00/66,568.88
  6. Step 6: Final answer
    x = 89,967.51

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.