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Finding the Fourth Proportional to 66,986.69, 100,528.64 and 53,995.91

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Solution

The fourth proportional to 66,986.69, 100,528.64 and 53,995.91 is: 81,033.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,986.69 : 100,528.64 = 53,995.91 : x
  2. Step 2: Convert to fraction form
    66,986.69/100,528.64 = 53,995.91/x
  3. Step 3: Cross multiply
    66,986.69x = 100,528.64 × 53,995.91
  4. Step 4: Simplify right side
    66,986.69x = 5,428,135,784.17
  5. Step 5: Solve for x
    x = 5,428,135,784.17/66,986.69
  6. Step 6: Final answer
    x = 81,033.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.