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Finding the Fourth Proportional to 66,607.68, 91,915.71 and 36,391.59

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Solution

The fourth proportional to 66,607.68, 91,915.71 and 36,391.59 is: 50,218.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,607.68 : 91,915.71 = 36,391.59 : x
  2. Step 2: Convert to fraction form
    66,607.68/91,915.71 = 36,391.59/x
  3. Step 3: Cross multiply
    66,607.68x = 91,915.71 × 36,391.59
  4. Step 4: Simplify right side
    66,607.68x = 3,344,958,832.88
  5. Step 5: Solve for x
    x = 3,344,958,832.88/66,607.68
  6. Step 6: Final answer
    x = 50,218.82

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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.