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Finding the Fourth Proportional to 73,221.07, 109,706.21 and 39,964.47

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Solution

The fourth proportional to 73,221.07, 109,706.21 and 39,964.47 is: 59,878.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,221.07 : 109,706.21 = 39,964.47 : x
  2. Step 2: Convert to fraction form
    73,221.07/109,706.21 = 39,964.47/x
  3. Step 3: Cross multiply
    73,221.07x = 109,706.21 × 39,964.47
  4. Step 4: Simplify right side
    73,221.07x = 4,384,350,538.36
  5. Step 5: Solve for x
    x = 4,384,350,538.36/73,221.07
  6. Step 6: Final answer
    x = 59,878.26

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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.