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Finding the Fourth Proportional to 73,969.55, 110,957.93 and 20,661.47

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Solution

The fourth proportional to 73,969.55, 110,957.93 and 20,661.47 is: 30,993.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,969.55 : 110,957.93 = 20,661.47 : x
  2. Step 2: Convert to fraction form
    73,969.55/110,957.93 = 20,661.47/x
  3. Step 3: Cross multiply
    73,969.55x = 110,957.93 × 20,661.47
  4. Step 4: Simplify right side
    73,969.55x = 2,292,553,941.96
  5. Step 5: Solve for x
    x = 2,292,553,941.96/73,969.55
  6. Step 6: Final answer
    x = 30,993.21

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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.