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Finding the Fourth Proportional to 66,359.76, 91,573.84 and 36,144.60

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Solution

The fourth proportional to 66,359.76, 91,573.84 and 36,144.60 is: 49,878.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,359.76 : 91,573.84 = 36,144.60 : x
  2. Step 2: Convert to fraction form
    66,359.76/91,573.84 = 36,144.60/x
  3. Step 3: Cross multiply
    66,359.76x = 91,573.84 × 36,144.60
  4. Step 4: Simplify right side
    66,359.76x = 3,309,899,817.26
  5. Step 5: Solve for x
    x = 3,309,899,817.26/66,359.76
  6. Step 6: Final answer
    x = 49,878.12

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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.