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Finding the Fourth Proportional to 66,142.59, 91,224 and 43,504.83

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Solution

The fourth proportional to 66,142.59, 91,224 and 43,504.83 is: 60,001.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,142.59 : 91,224 = 43,504.83 : x
  2. Step 2: Convert to fraction form
    66,142.59/91,224 = 43,504.83/x
  3. Step 3: Cross multiply
    66,142.59x = 91,224 × 43,504.83
  4. Step 4: Simplify right side
    66,142.59x = 3,968,684,611.92
  5. Step 5: Solve for x
    x = 3,968,684,611.92/66,142.59
  6. Step 6: Final answer
    x = 60,001.95

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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.