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Finding the Fourth Proportional to 66,079.70, 91,265.66 and 43,519.54

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Solution

The fourth proportional to 66,079.70, 91,265.66 and 43,519.54 is: 60,106.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,079.70 : 91,265.66 = 43,519.54 : x
  2. Step 2: Convert to fraction form
    66,079.70/91,265.66 = 43,519.54/x
  3. Step 3: Cross multiply
    66,079.70x = 91,265.66 × 43,519.54
  4. Step 4: Simplify right side
    66,079.70x = 3,971,839,541.00
  5. Step 5: Solve for x
    x = 3,971,839,541.00/66,079.70
  6. Step 6: Final answer
    x = 60,106.80

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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.